Proceedings of the United States National Museum

PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM

issued i^^(V>\,0?^i

h

^the

SMITHSONIAN INSTITUTION

U.S.NATIONALMUSEUM

Vol.90 Washington:1941 No. 3116

A REVISION OF THE CHALCID-FLIES OF THE GENUS MONODONTOMERUS IN THE UNITED STATES NATIONAL

MUSEUM

Bv

A.B.

Gahan

The

chaiid genusMonodontomerus

Westwood

is recordedfrom all

thefaiinalregionsexcept theEthiopianandAustrahan. Representa- tives of the genus are in the United States National

Museum

from France, Germany, Russia, China, Japan, Mexico, Cuba, theUnited States,and Canada.

Only those species of which actual specimens are at

hand

have been included in this revision, since it isimpracticable to place the othersbytheirdescriptions.

The

species thusomittedfromthekey are nitidus Newport,punctatus Thomson,rugulosusThomson, strobili

Mayr,^{usticensis Riggio}and Destefani,vireijsThomson,laricisMayr, argentinus Brethes, cupreus (Spinola),inclusus KiefferandJorgenson, phormio Walker, schrottkyi Brethes, trichiophthalmus (Cameron), vianai Bl an chard, and nubecula Rondani.

GENERICCHARACTERS OFMONODONTOMERUS

The

following combination of characters will distinguish

Mon-

odontomerusfromallothergenera placedinthesubfamilyMonodontorn- erinae: Antennae 13-jointed (scape, pedicel, one ring joint, seven funicular joints, and three club joints); flagellum cylindrical, not or oidyslightl}^thickenedtowardapex; occiputmargined; scutellum with a distinct transverse furrow; postscutellum usually with a median carina;

propodeum

with a triangular or subtriangular depression

;i22223—41 ¹ 461

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medially, the depression broadest anteriorly, bisected by a median longitudinal carina, the two sections of the depression more orless foveolated;posterior coxalarge, with a more orless prominent pro- tuberance near apex on the inner dorsal margin; posterior femur rather broad, witha singletoothonventralmargin beyondthemiddle;

posteriortibiawithtwo moderatelylong,unequalspurs locatedatthe apex; fore wing extending beyond apex of abdomen; marginal vein usuallyabouthalfaslongas submarginal; postmarginal vein shorter thanmarginal; stigmal veinatleastalittleshorterthan postmarginal;

abdomen

sessile,never stronglycompressedordepressed,andapproxi- mately as long as head and thorax; posterior margins of tergites (exceptsometimesthe thirdtergite)not emarginate;ovipositoralways prominently exserted.

KEYTOTHESPECIESOFMONODONTOMERUSINTHEUNITED STATES NATIONAL MUSEUM

1. Scutellum, behindcross furrow,smooth andpolishedexceptfor

afewweaklineslaterally 12

Scutellum,behindcross furrow, distinctly sculptured, sculpture usuallyweaker medially thanlaterallyandoccasionallywith

amedianarea quitesmooth 2

2. Malarfurrow absentorimpressedforonlyaveryshortdistance adjacent to eye margin; face convexly swollen below an-

tennae 11

Malarfurrowpresent andcomplete;face flator nearlyso, at

leastnotmarkedlyswollen 3

3. Ovipositorobviouslyshorterthanabdomen 4

Ovipositor atleastverynearly aslongasabdomen, usually as

long asabdomenor longer 9

4. First tergitewith very shallowbutrather distinct reticulation

overitsdorsal surface 1. dianthidii, newspecies

First tergite dorsallywithoutsculpture 5

5. Forewingwithouta stigmal cloud;propodeumbasallyon each side ofmediancarinawithabroadly roundedandratherdeep depressionbehindwhichisalesswelldefinedandmuchsmaller depression; funiclejoints,exceptfirst,broaderthanlong; ovi-

positorabout half aslongasabdomen 2. aereusWalker Fore wing with a distinct cloud atstigmal vein; propodeum

withmediandepressionelongateandnarrower;funicle joints rarelybroader thanlong;ovipositor usuallybut not always

morethanhalf aslongasabdomen 6

6. Middleandforelegs,excepttheircoxae, entirelyreddish yellow;

ovipositorlessthanhalf aslongasabdomen cubensis,newspecies Middle and fore femora always metallic or black; ovipositor

abouttwo-thirds aslongasabdomen 7

7. Scapemetallic green; posteriortibia,exceptatbaseandapex, metallic green andmiddle and anterior tibiaemore or less

tingedwithmetallic ^4. viridiscapus,newspecies

Scapetestaceous,sometimeswashedwithmetallictoward apex;

alltibiaereddish testaceous 8

THE GENUS MONODONTOMERUS — ^GAHAN 463

8. Dorsumofthorax uniformly copperygreen 5. mexicanus, newspecies

Dorsum ofthorax dark green with only avery slightbrassy

tint 6.indiscretus,newspecies

9. Propodeum laterad of median depression very weakly sculp- tured, practicallysmooth; forewing with adistinct stigmal

cloud; eyes conspicuously pilose 7. obscunis Westwood Propodeumlaterad ofmediandepression distinctly sculptured;

stigmal cloud very faint or absent; eyes with very short,

sparse,inconspicuouspile 10

10. Mandiblestridentate, ventraltooth notoronlyslightlyextend- ing beyond apex of middle tooth, and inner tooth only

slightlybasadofothertw^o;allthree teethshort-.8. montivagus Ashmead Mandibles bidentate, ventraltooth elongateandacute, inner

toothsmallandlocated farbasadof apexofventralone

9.mandibularis,newspecies 11. Posterior marginof third tergitenotemarginate;malar space

equaltomorethanhalfheightofeye; ocellocularlineequal to nearly twicediameterofalateralocellus;pronotum and

prescutum withstrong purplish reflections 10. bakeri,newspecies Posteriormarginofthird tergitedeejjlytriangularlyemarginate

atmiddle; malar spaceless thanhalf as long as eye;ocel- locular lineonly slightly longer than diameter ^of alateral ocellus; pronotum very slightly tinged with purplish, pre-

scutumwithout purplereflections 11. emarginatus,newspecies 12. Toothonposteriorfemur aboutitsown length beforeapex of

femur; punctate groove setting off marginal frenum on scutellumcontinued uninterruptedly around apexof scutel-

lum;mediandepressiononpropodeumsharplytriangular 13 Toothonposteriorfemurat leasttwiceitsownlength before

apexoffemur; punctate groovesettingoffmarginalfrenum moreor lessinterrupted at apex of scutellum; median de- pression on propodeum sometimes about as broad poste-

riorlyas anteriorly 14

13. First tergite dorsally distinctly reticulatelysculpturedonapical half; ovipositor half to two-thirds as long as abdomen;

mesoscutumblackish,scutellumdark green;scapeoffemale usually metallicgreen;scapeandface ofmalemetallicgreen

12. dentipes(Dalman) First tergite not sculptureddorsally; ovipositornot overhalf

as long asabdomen; mesoscutum andfrequently scutellum stronglypurplish or violaceous; scape offemaletestaceous, sometimes slightlymetallictoward apex; scapeand face of

male brassy green 13.japonicus Ashmead

14. Mediandepressiononpropodeumacute posteriorly oratleast subacute; sculpture on propodeum laterad ofthe median depression consisting of obliqueh^ transverse rugae;toothon

posterior femur slender 14.subobsoletus,newspecies Median depression on propodeum aboutas broad posteriorly

as anteriorly; sculpture laterad of mediandepression more reticulate; tooth on posterior femur broader at base and

somewhatlessslender 15. obsoletus(Fabricius)

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1.

MONODONTOMERUS

DIANTHIDII,newspecies

MajT- be distinguished, from all other species having the apex of scutellumsculptured,

by

thedistinctthoughverj^shallow sculpturing ofthedorsumofthefirsttergite.

Female.

—

^{Length 3.25}

^mm.;

^{ovipositor 1}

^mm.

^{General color}

aenescent blackish; head dark metallic green, the face tinged with cupreous; antenna! scapemostly testaceousbut darker and more or less tinged with metallic toward apex; flagellum brownish black;

propodeum

tingedwithgreenish;allcoxaeand femora dark brownish withmetallic reflections;alltibiaeandtarsitestaceous;wingshyaline with only veryfaint indication of infuscation atstigmalvein;

abdomen

bronzy black;ovipositorsheaths black with apaler stripeon ventral marginextending from base to near apical one-fourth.

Head

uniformly shagreened, temples nearly transverse^tothelongi- tudinalaxis ofbody;eyes with verysparse,shortpile;ocellociilarline

aboutequaltodiameterof ocellus;malarspace equaltoapproximately one-third the eye height; malar groove complete and distinct; face nearly flat; clypeus protruding veryslightly beyond anteriormargin of head; mandibles with the two ventral teeth short and subequal.

Antennaeinsertedabovelowerextremities of eyes; scape not reaching to anterior ocellus; pedicel barely longer than broad; ring joint strongly transverse; first funicular joint about as long as broad, followingjoints of funicleallalittlebroader thanlong;club notthicker thanfunicleand aboutaslongastwoprecedingjointscombined.

Thoraxapproximately twiceaslongasbroad, rugulosely sculptured onthedorsum,without obvious^pitsor punctures, the rugulae forming irregularly shaped areas; scutellum longer than broad, distinctly sculptured behind as well as before the transverse furrow and with thepunctate marginal groove continuousaroundapex;apexof scutel-

lum more

strongly produced over postscutellum than ^{usual; post-} scutellum smooth, with adelicatemedian carina;median depression on

propodeum

triangular, the surface between this depression and spiracular groove distinctly reticulately sculptured. Tooth on posteriorfemurnotslender,located atapproximately the apicalone- fifth of femur. Anterior wing extending nearly to apex of ovi- positor; submarginal, marginal, postmarginal, and stigmal veinsin approximately the proportionsof 25, 10, 9, and4,respectively.

Abdomen

aboutaslongas thorax, slightlycompressed,reticulately sculptured; first tergite dorsally about as distinctly aciculately sculpturedasthe othertergitesandcomprising alittle

more

than one- third length ofabdomen; second ^tergite about one-fourth aslong as first; third nearly twiceaslong as second; fourth shorterthanthird butlongerthan second;fifth andsixthveryshort, thesixthwith the spiracles sunkinunusuallydeeppitsandbare exceptforfour orfive

THE GENUS MONODONTOMERUS — GAHAX 465

erect hairs just dorsad of each spiracle; posteriormargin of none of the tergites emarginate medially;ovipositornot solong asabdomen.

Male.—

hength 2.G

mm.

Scape not swollen, slightly curved, and wholly metallic; ocellocular line a little shorter than diameter of ocellus;malarspace aboutone-fourth length ofeye; eyes ratherdis- tinctly pilose;

abdomen

notquite so long as thorax, not compressed;

firsttergitecomprisingalittle

more

than one-third lengthof

abdomen

;

second and third subequal and together a little shorter than first;

fourthandfifthsubequalandeachaboutaslongas third; sixth shorter, nearly perpendicular, and with the spiracles in shallow depressions.

Otherwiselikethe female.

Typelocality.

—

^{Boulevard, Calif.}

Type.—

v. S.N.

M.

No. 54260,

Describedfrom3females(1 holotype)and 10males reared

by

L.

H. Weld,

March

2, 1922,froma cellofDianthidiumonoak.

2.

MONODONTOMERUS

AEUEUSWalker MonodontomerusaereusWalker, Ent.Mag.,vol._2,p.158, 1834.

Monodoniomerus aereus is rather easily recognized because of ^its unusually short ovipositor, thisrarely being

more

than half aslong as the abdomen.

The

antennaeare alittleshorterand thickerthan usual, with allfuniclejoints, except thefirst, distinctlybroader than long, the flagellum black, the scape usually

more

or less testaceous basallybeneath.

The

eyes are inconspicuously pilose, the pile very short.

The

scutellumisabout asbroad as long, itsapexbehind the cross furrow uniformly strongly sculptured with longitudinal rugae, and with the marginal groove uninterrupted medially.

The

post- scutellum issmooth,distinctly broader thanlong, andhas a distinct median carma.

The propodeum

at baseoneach side ofthe median carina has alarge, more orlessrounded, andrather deep depression andbehindthisa

much

smallerone,thesurface of

propodeum

between the mediandepression and the spiracular sulcusstronglysculptured.

The

fore

wmgs

extendbeyondthe apexofthe

abdomen

nearly tothe apexof the ovipositor and are hyaline and without a fuscous cloud atthestigmalvein.

The

toothon thehind femurisprominent and ratherbroad.

The abdomen

isabout aslongas thethorax, thefirst tergite dorsally perfectly smooth and comprising approximately one- third ofthelengthoftheabdomen, the followingtergitesm.oreorless distinctly sculptured.

The

head and thorax have the usual type of sculpture forthegenusandarenearly imiformly greenish black with a brassytint.

The

coxaeand femoraareconcolorouswith thethorax andthe tibiae andtarsi arereddish

brown

todark brown.

The

first tergite is bluish green and the following tergites blackish with a metallicsheen.

The

lengthofthebodvrangesfrom2.3 to 3.5

mm.

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This specieshas been recorded from a long Hst of lepidopterous, hymenopteroiis, anddipterous hostsandis

known

todevelopas both a primary and a secondary parasite. It was originally described fromEurope,w^hereitiswidelydistributed,andhasalsobeenreported from Japan. Voluntarily introduced into America to combat the gipsyand browntailmoths, it issaid

now

^to be distributedover the entireregion infested by these pests.

A

detailed accountof the life history, distribution, andhostsofaereusisgivenby

Muesebeck

^' and

may

beconsultedfor

more

complete information.

3.

MONODONTOMERUS

CUBENSIS, newspecies

The

apexofthe scutelluminthisspeciesislessstrongly sculptured and more ^shining than in an}^ ofthe otherspecies placedin the key underthegroup havingitsculptured. Insomespecimensthissculp- ture is, in fact, so

weak

that it

may

easily be overlooked unless a isdrly high magnification is used.

The

shorter ovipositor, together with the bright testaceous color of the anterior and middle legs, exclusive of their coxae, distinguishes the species from mexicanus, which itmostclosety resembles.

Female.

—

^{Length 3.3}

^mm.;

^{ovipositor0.8}

mm. Head

and dorsum of thorax nearly uniformly dull brassy green; propodeum, pleura, coxae,andallfemorablackishgreen,lessstrongly tingedwith brassy than the dorsum; anterior and middlelegs, except their coxae, pos- teriortrochanters, extremeapices of posteriorfemora,posterior tibiae and tarsi, and theantenna! scape bright testaceous; all tarsi alittle paler than tibiae; antennal pedicel brownish testaceous; flagellum black; wings hyaline, with a spot embracing the stigmal vein and extending approximately one-third of the

way

across the wing very darkfuscous;tcgulaefusco testaceous;

abdomen

blackishwithmetallic reflections.

Head

uniformly shagreened and rather densely hairy; 63^08 with sparse, short pile; ocellocular line equal to or very slightly shorter than diameterofalateralocellus;temples nearly transverseto longi- tudinal axis of body; malar space equal to about one-third the eye height; malar furrow complete and strong; anterior margin of face nearly straight, the clypeaimarginvery ^slightlyprotruded. Anten- na! scape cylindrical, not quite attaining front ocellus; pedicel very nearlyasbroad as long; ring jointstronglytransverse; funiclethicker than pedicel and of the same thickness throughout its length; first funicle joint a little longer than broad, all the others quadrate or nearlyso;clubovate, slightlybroader thanfunicle,andalittlelonger thantwoprecedingjointscombined. Mandiblewiththreeveryshort, subequalteeth.

1Journ. Agr.Res., vol.45,No.5,pp.445-460, 1931.

THE GENUS MONODONTOMERUS — ^GAHAN 467

Thorax dorsally strongly shagreened and densely clothed with rather long whitishhairs;scutellumaboutasbroadas long, only very slightly overlapping postscutellum, weakly sculptured and shining behind the transverse furrow, the punctate marginal groove com- plete; postscutellum practically smooth and with only a very

weak

suggestion of a median carina; mesepisternum strongly sculptured;

mesepimeronnot entirelj^ smooth;

propodeum

about half as longas scutellum, with a moderatelydeep triangularmediandepression and with the surfaces between this depression and the spiracular sulci strongly rugulose; all coxae strongly sculptured; hind femur reticu- latelyaciculated,notespeciallybroad,theventraltooth acutelytrian- gular and located approximately at apicalone-sixth offemur.

Anteriorwingextendingalittlebeyond apexofabdomen;submargi- nal, marginal, postmarginal, and stigmalveins in approximately the proportionsof 30, 13,6, and5, respectively;hindwingnotquite at- tainingendofabdomen.

Abdomen

moderatelycompressed, rather finely and evenly reticu- lately aciculate on sides; first tergite dorsally perfect^ smooth and comprisingabout one-thirdlength of abdomen;second tergite short, sometimes entirely hidden dorsally beneath the first; third and fourth tergites dorsally subequal and together a little longer than

first; fifth and sixth tergites subequal on dorsal line and together aboutequalinlength to the fourth,thesixthwithnumeroussuberect hairs laterally and with spiracles in rather shallow pits; ovipositor aboutone-thirdaslongasabdomen.

Ty]^elocality.

—

Santiago delasVegas, Cuba.

Type.—V.S.^M.

No. 54261.

Sevenfemales (one, holotype) said tohave been reared from

Eu-

proctis argentifluo.Hiibner

by

A. R. Otero, September 27, 1930.

4.

MONODONTOMERUS

VIRIDISCAPUS, newspecies

Female.

—

Length3.5

mm.;

ovipositor 1.25

mm.

Agreeingwith the description of mexicanus except in the following particulars:

Head

green,withscarcelyanybrassytinge;scapeentirel}^greenandstrongly sculptured;posteriortibiadarkbrovrnishwith ametallicgreentmge,

its extreme base narrowly and approximately the apical one-third reddish testaceous; anterior and middle tibiae more or less tinged with metallic;firsttergitedorsally distinctlybluishgreen;ocellocular lineobviously a little longerthan diameterof lateral ocellus; length ofeyeaboutthreetimes lengthofmalarspace; anteriormarginofface not straight but distinctly a little concave; postscutellum perfectly smooth and polished, with a very

weak

median carina; second seg-

ment

of

abdomen

dorsally ver}^ short; third tergite not longer than fourth.

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Male.

—

^Length 2.6

mm.

Similar to the female but with the first tergitecomprisingabout two-fifths oflengthof abdomen, thesecond tergite dorsally completely concealed beneath the first. Antennae mostly missingfrom theone specimenavailable.

Tupelocality.

—

^{Orizaba,Mexico.}

Type.—V.S.'^.M. No. 54262.

Describedfrom4 females (one holotype)and one malebearing only thelabel"Orizaba."

The

collectoranddateof collectionnotknown.

5.

MONODONTOMERUS

MEXICANUS.newspecies

Similarto montivagus

Ashmead

but distinguishable atonceby the conspicuous fuscous cloudembracing thestigmalvein,bythepropor- tionallyshorter ovipositor, and bythe conspicuously hairyeyes.

Female.

—

^Length exclusive of ovipositor 2.75 lo 4

mm.,

ovipositor 0.8 to 1.38

mm. Head

dull metallic green, oftenmoreorlesstinged withbrassy;thoracicdorsumdullcopperygreen; propodeimi, pleura, all coxae, and all femora darkgreen;mesepimera brassy; tibiae and

tarsireddishtestaceous;antennal scapetestaceous, sometimes washed with metallic green toward apex; pedicel dark metallic; flagellum black;mandibles testaceous;wings hyaline exceptfora conspicuous fuscous cloud embracing the stigmal

vem

and extending approxi- matelyone-third ofthe

way

acrossthe

wmg;

tegulae metallicgreen;

abdomen

greenish black; ovipositor sheath black with the extreme apex andanarrowlongitudinal stripeextendingfrombase two-thirds of the distancetoapextestaceous.

Head

nearly uniformly heavily jshagreened and rather densely clothed with conspicuous whitish hairs; eyes densely and conspicu- ouslypilose; ocelli inalowtriangle; ocellocular lineequal toorvery slightly exceeding diameter of lateral ocellus; temples nearly trans- verse;length ofeye aboutthree and one-half times length ofmalar space;malarfurrow complete;anteriormarginoffacenearlystraight, the clypeal

margm

very slightlyprotruded but straight. ^'Antennal scape subcylmdrical, not quite reaching anterior ocellus; pedicel approximately one and one-half times as long as broad;

rmg

joint transverse; funicle thicker than pedicel and of the same thickness throughout; first funicular jomt slightly longer than broad, the following joints subquadrate; club not thicker than funicle, conic ovate,and aboutequalinlengthtothetwoprecedingfunicular joints combined.

Pronotum, mesoscutum, scutellum, andaxillaestronglyshagreened and conspicuously hahy; scutellum about as broad as long, with a distinct butshallow transverse furrow behind the middle, and cari- nately

margmed

atapex, the groove settingoff the apical carina not interrupted medially; surface ofscutellum behind transverse furrow

THE GENUS MONODONTOMERUS — ^{GAHAN 469}

distinctly sculp^ttired, alittle

more

weaklysomedially thanlateral^;

postsciitelkmi distinctly finely sculptured; pleuron, except mesepi- meron, strongly punctate;mesepimeron mostly smooth. Propodeimi about^{'half as long as scutellum, densely clothed} with long white hairs laterad of sph-acular sulci, bare medially; spiracular sulci

broad and ^foveated;

propodeum

^{medially with a deep, triangular} depression dividedⁱⁿthemiddle

by

a longitudinal carina,^thisdepres- sionbroadestanteriorly,extendingfrombase nearly^toapexofpropo-

deum

andoften

more

orlessweakly foveated;surface of

propodeum

between median^depressionandspiracularsulcidistmctlyreticulated.

All coxae and femora strongly sculptured; posterior femur with ventral tooth a^littlelongerandslendererthanusual.

Anteriorwingalittle

more

than two and^{one-halftunes aslong as} broad, reachmgnearly to apex of ovipositor;submargmal, marginal postmargmal, and ^stigmal

vems

approxunately

m

the proportions ^of 70, 36, 16, and 10, respectively; basal cell completely outlmed

by

distmci rows of hairs and with several additional hairs within the cell; ciliaondisk ofwing moderatelydense; marginalciliaveryshort.

Posteriorwing reachmg^toapexofabdomen.

Abdomen

^{about as long as} thorax, distinctly shagreened on sides andbeneath;firstsegmentdorsally perfectlysmooth andconstituting approximately one-third ^total length of abdomen; second segment dorsally very famtly transversely ^aciculated and about ^{one-fifth as} long as first; third and fourth segments dorsally distinctly trans- versely aciculated, the third three orfour timesaslong asthe second, the fourth sUghtly ^shorter than thnd; fifth, sixth, and seventh seg- mentsshort, togetheraboutequalinlengthto the fourth. Ovipositor exsertedabout two-thu^ds length of abdomen.

Male.—

Length 2.8

mm.

Differs from female only ⁱⁿ the usual sexual charactersandinitssmaller size.

Tyjye locality.—JncBla,Hidalgo, Mexico.

Type.—V.S.^.M.

No.54263.

Described from 20 females (1 holotype) and 7 males reared

May

25to 28, 1939, fromcocoonsof Trypoxylon mexicanumSaussure ^col- lected at Jacala,Hidalgo, Mexico,

by

Phil

Rau

andbearinghisnote numbers ¹⁴⁷⁷and 1506.

6.

MONODONTOMERUS

INDISCRETUS, newspecies

Female.—Length ^3.3

mm.;

ovipositor 1.1

mm.

This species apparently canbedistinguishedfrommexicanus only

by

thefactthat the dorsum of the thorax is blackish green with only very ^slight brassyreflections,the thorax appearstobe^slightly

more

^slenderand

alittlelessconspicuouslyhairy,andthe

hmd

femurisapparently not quite sobroad.

322223-41 2

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All these characters are relative, and were it not for the widely differenttypelocalitiesandthetotally differenthostsIwouldhesitate toconsider indiscretusadifferentspeciesfrom7ne.r.icanys,butbelieve itadvisabletodo sounderthe circumstances.

Typelocality.

—

BarHarbor,]\Iaine.

TijjJe.—V.S.NM.No.54264.

Describedfromfourfemales received fromA. E.Brower,

Two

of these (one, holotype) are labeled "Pars, of PhyUotoma nemorata Fallen, bredJune 9, 1936."

The

othertwo were bred on the same date frombirchleaves containing thesame PhyUotoma.

7.

MONODONTOMERUS

OBSCURUSWestwood

MonodoniomerusobscurusWestwood, Philos.Mag.,ser. S, vol.2,p.443, 1833.

Monodontomerussp.Rau,Ann. Ent.Soc.Amer.,vol.30,p.338, 1937.

This species apparently has not previously been recognized from America. In Europe it is variously recorded from hymenopterous, dipterous, and lepidopterous hosts.

Among

the hymenopterous hostsare at least three species ofthegenusOsmia. O.

W.

Richards^{^} recordeditasaparasite ofOsmiaemarginataLepineyinthePyrenees Mountains, and Marechal^{^} reared numerous specimens from nests of 0. cornuta (Latreille) and 0. rufa (Linnaeus) collected at Liege, Belgium.

ThreespecimensofaMonodontomerussaid tohave emerged froma cocoonofOsmialignariaSaytakenatNesco,Crawford County, Mo., were recently receivedfrom Phil

Rau

ofSt. Louis.

The

Osmia

had

utilized an

empty mmd

cell of Sceliphron cementarium (Drury) as a pupation chamber. Five other specimens of the same Monodonto- merus rearedfromOsmiacordataRobertsonhad previouslybeensent inby Mr. Rau. Theseformed the basis forthenoteon Monodonto- merus sp.

by Rau

cited aboveinsynonymy. Otherspecimens

m

^the

United States National

Museum

indistinguishable from the above are as follows:

Two

said tohave emerged from cells of 0. lignaria collected at Nyack, N. Y., in 1885,

by

J. L. Zabriskie;one taken at

Mount

Pleasant, Iowa, June 7, 1933,

by

H. E. Jacques; and four collected at

Washmgton,

D.

C,

without furtherdata.

These specimens have been com.pared with two specimens from Europe identified by F.

Ruschka

as Monodontomerus obscurus and also with

Westwood

's original description of that species, and they seemtoagreesocompletely thatI

am

convinced theyareWestwood's species.

M.

obscurus differs from other

known

species found in America by having the surface of the

propodeum

lying between the median

2Ent.MonthlyMag.,vol.6fi,p.91,1930.

3Soc.Ent. France Livre Centenalre,p.509,1932.

THE GEKUS MONODONTOMERUS — ^GAHAN

471 depressionandthe spiracularsulcinearlysmooth andpolishedexcept forsome

weak

reticulation near the spiracles and occasionally some subobsolete lineson the disk.

The

median depressiononthe propo-

demn

is miusually shallow and mostly confined to the anterior half of the propodeum, the posterior half of that sclerite having only a verynarrowcrease orgrooveon each side ofthe mediancarina.

Female.

—

^Length 4.2

mm.;

ovipositor 1.8

mm. Head

dull bluish green; thoraxblackish, tintedmore orlessstronglywith bluishgreen onposteriormarginofpronotum,posterior half ofprescutum,scapulae, andscutellumin front of crossfurrow; scutellum behindcross furj-ow black; axillae stronglytmtedwith coppery;

propodeum

bluishgreen;

pleura black varied with green on mesepisternum; allcoxaeand fe-

mora

blackish, tintedwith green;tibiae andtarsireddish testaceous;

antenna] scape testaceous, darker toward apex; pedicel brownish;

flagellum black; mandiblesdarkreddish;wings hyaline,with a

weak

though obvious infuscation around the stigmal vem; tegulae dark brown;

abdomen

black, thebasebeneathoftenmoreorlesstestaceous and the fu-st tergite dorsally slightly greenish; ovipositor sheaths black, with a pale stripe beneath extendingfrom base two-thirds of distance toapex.

Head

nearlyimiformly heavily shagreened and moderatelyclothed with whitishhairs. Eyesdistinctly pilose;ocelliratherlarge,ina low triangle;ocellocularlineequaltolongestdiameterofalateral ocellus;

malar space equal ^to approximately one-third height of eye; malar groove present; anterior margin of face nearly straight. Antennal scape subcylmdrical, nearly reaching to lower margin of anterior ocellus;pedicelalittlelessthan twiceaslongasbroad;ringjointabout two-thirdsasbroad aslong;firstfunicular jointsubequal

m

lengthto pedicelbut distinctly thicker, alittlelonger than broad; other^joints of funicle subquadrateand nothickerthanfirst;club thesame thick- ness as funicle and about as long as two preceding funicular joints combined.

Thorax strongl}' shagreened and moderately hairy; parapsidal gi'ooves sharply impressed; scutellum distinctly longer than broad, with a distincttransverse furrow at apicalone-third and carmately

margmed

at apex, the groovesetting oft' the apicalcarma^foveolated and not interrupted at middle; surface of scutellum behind cross furrow distinctly reticulated, alittle

more

weakly so medially than laterally; mesepimeron smooth and bare, remainder of pleuron dis- tinctlysculptm-edandhairy;

propodeum

hairj^laterally,bare medially;

spiracular sulci strongly foveated; all coxae and femora distinctly sculptured, the medianpair less strongly so than the others; tooth onhind femur short, blmit, and located a littlemore than one-fiftli the length offemurbeforeitsapex.

472

PROCEEDINGS OF

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vol.90

Anteriorwing morethan two andone-halftimesas long asbroad;

submarginal, marginal, postmarginal,and stigmal veinsabout in the proportions of 57, 27, 13, and 8, respectively; basal cell completely outlined

by

distinct rowsofstronghairs andwith afewhah's within the cell; ciliation on disk ofwing moderately dense; marginal cilia verydense.

Abdomen

about as long as thorax, distinctly sculptured on the sides, thefirsttergitedorsallysmooth and the followingtergitesdor- sally verywealdy lineolately sculptured; first tergite constituting a

littleless than one-thirdlength ofabdomen, alittlemore than twice aslongassecond;thndtergiteoneandone-half timesaslongassecond;

fourthaboutequalinlengthtosecond;fifthalittleshorterthanfourth;

sixthand seventh togetherabout equalto fourth; ovipositor sheaths aboutaslongasabdomen.

Male.

—

^{Length 3.2 to 3.9}

^mm.

^{Similar to thefemale,} except that the scapeisdark,thefirstfunicular jointisnolongerthan broad, the otherfunicular joints areallsligiitlybroaderthanlong,andthesecond abdominalteigiteisveryshort, sometimesalmost completely covered

by

thefirst tergite.

8.

MONODONTOMERUS

MONTIVAGUSAshmead

MonodontomerusmontivagusAshmead,ColoradoBiol. Assoc.Bull. 1,p. 25,1S90.

Monodontomerus americanus Girault, Descriptiones stellarum novarum,p. 11, 1917. (Newsynonymy.)

The

types ofmontivagusandamericanus have been compared, and they do not differ in any dependable character.

The

holotype of americanusisateneralspecimenas

shown by

otherspecunenscollected at the same time and place, and this fact accounts for the slight differences in color mentioned by Girault as distinguishing it from montivagus.

Feraale.

—

^Length3 to 5.1

mm.;

ovipositor1.6 to2,8

mm.

General color distinctly and nearlyuniformly metallic greenwith brassy re- flections of variable intensity on head and thorax; femora metallic green; all tibiae, all tarsi, antennal scape, and mandibles reddish testaceous, the scape sometimes fuscous apically, flagellum black;

wingshyaline, usually with averylight infuscation at stigmalvein;

abdomen

shhiingdark gi'een;ovipositorblackishwith the lowermar- gin

more

orlesspale. Vestiturepale grayish.

Eyes weakly pilose, the pile short and inconspicuous;malar space equal to approximately one-third the length of eye but variable in length; malar groove distinct; anterior margin of head straight;

mandibles withthreeshort teeth,the ventral toothnot orverylittle longerthan the middle one^;ocellocularliuebarelylongerthandiameter of lateral ocellus; antennae inserted a little above lower margins of

THE GENUS MONODONTOMERUS — ^GAHAN 473

eyes, the face distinctly more than half as long as distance from antenna!fossae toanterior ocellus; funicular jointsquadratetoalittle longerthan broad;ring joint about twice asbroad as long. Thorax appearingalittlenarrowerinproportiontoitslengththanin

some

of the other species, and with scidpture of

mesonotum

and scutellum

made

up of distinct punctures intermingled with very finereticula- tions or wrinkles;scutellumbehind transverse gToovcfinelyaciculated, the aciculationweakermedially, tlie marginal groove uninterrupted;

postscutellum smooth, with a

weak

median cariria;

propodeum

with mediandepression rather shallowandtriangular; suiface of

propodeum

between mediandepression and spiracularsulci distinctly aciculately sculptured; mesepimeron polished;mesosternum and mesepisternum with vei-y shallovr reticulation, the mesepisternum more strongly sculptured along itsposteriormargin; posteriorcoxae strongty sculp- turedoutwardly,anteriorand middlecoxaelessstronglyso;posterior femur not

much

^thickened and with tooth on ventral margin not especially long or slender and locatedat about apical one-fom*th of femm*; wings extendingbeyond apexofabdomen; submarginal,mar-

ginal, postmarginal, and stigmal veins in approximately the propor- tions of 40, 16, 8,and5,respectively;

abdomen

aboutaslongashead and thorax together; first tergite comprising about one-third length of abdomen, perfectly smooth dorsally; second, tiiird, and fourth tergites dorsallywith

weak

transverse aciculations, smoother toward apex; fifth tergite smooth dorsally; ovipositor sheaths equal to or a

littlelongerthan abdomen.

Male.

—

^{Length 3.2 to 4.2}

mm.

Similar to the female except that the antemial scape ^is

much

thickened, stronglycurved dorsally.and deeply and broadly excavated or notched ventrally; the funicular jointsallquadrateornearlyso.

Redescribed from the following specimens:

One

female (type of montivagus),

West

Cliff, Colo.; one female, Boulder, Colo., collected August 1 at nest of Anthophora occidentalis by T. D. A. Cockerell;

tliree females,Boulder, Colo., July31, 1908, Cockerellcollector; one male, Custis County, Colo., Cockerellcollector; one male, Colorado

vSprings, Colo., July 14, 1895, Cockerell No. 3569; one male, on Populus, Boulder, Colo.,

May

8, 1895, Cockerell No. 2945; two fe- males, Santa Fe, N. Mcx., July 29, 1895, Cockerell No. 3918; two females, Helena, Mont., July 1892, H. G.

Hubbard

^{collector, ingal-}

leries of Melissodes; four females (one the type of americanus) and onemale, LosAngeles, Calif., Coquillettcollector; two females, Los Angeles, Cahf., from cell of Anihophora, A. Davidson collector; one female, Beaver Valley, Utah; four females, Algonquin, 111., C. F.

Baker, collector; and onefemale, Newark, Del.. June 6, 1932, L. A.

Steamscollector.

474

PROCEEDINGS OF

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MUSEUM

vol.90

The

above-mentioned female taken by Cockerell at the nest of

AnthophoraoccidentalisatBoulder,Colo.,has the apexofthemandibles

broadlj?^ romided with only very slight indications of apical teeth.

Otherwise it does not differ materially from other specimens of the speciesandit isbelieved that the mandiblesaresimply worn.

9.

MONODONTOMERUS

MANDIBULARIS,newspecies

Monodontomerus montivagus Rau (not Ashmead), Trans. Acad. Sci. St. Louip, vol. 24, p. 35,1922.

Monodontomerussp.Frisox, Trans.Amer. Ent. Soc,vol. 48, p. 154, 1922.

Monodontomerussp.Rati,Trans.Acad.Sci.St.Louis,vol. 25, p.222, 1926.

This species is difficult to distinguish from montivagus except by the mandibles,whichin mandibularis are bidentatewith the ventral tooth long and acute, the inner tooth small andlocated farbasad of the apexofthe ventral toothso thatitsapexisapproximatelyat the basal two-thirds of the mandible.

The

antennae are inserted only veryslightlyabovealinecomiecting the lower extremities ofthe eyes andthe distancefromthebaseoftheantennaetotheanteriormargin of the clypeus is only slightly more than half the distancefrom the lowermargin ofthe antennal fossae to the lowermargin of the an- terior ocellus.

The

ocellocular line is distinctly a little longer than the diameterofalateralocellus.

The

above characters hold for both sexesand are apparently the only ones by which mandibularis can be separated from montivagus.

The

size,color, andlength of ovipositor are wellwithin the range of variation stated in the foregoing description of montivagus.

The

scapesofthemalesare alike forthetwospecies.

Typelocality.—St.Louis,

Mo.

Type.—V.S.'N.M. No.54265.

Described from the following specimens: 4 females (including the holotype)and4males (includingtheallotype),rearedbyP.Eau^from Anthophora abrupta Say,

May

13, 1910, at St.Louis, Mo.;1female and 3males, St.Louis, Mo.,P. Rau, No. 4181, hostand dateofcol- lection

unknown;

4 females reared from Anthophora abrupta, Oak- wood,111.,June 9, 1919, T. H.Frison,Exp.

D;

1 femaleand 1 male, rearedfrom A. abrupta,

Henry

County, Ohio, 1931,

W.

^E.

Dmiham;

46 females and 10 males, underBur. Ent. No. 862P°^ reared from Anthophoraabrupta Say in the vincinity of

Washmgton,

D.

C,

and bearing therespectivedates

November

17, 1877,

May,

July,and

Nov-

ember1878;5femalesfrom

Bayou

Sara, La.,E. A.Schwarzcollector,

January 23, 1879, alsounderBur. Ent. No. 862P°^ (specimens badly broken); 10 femalesand 1malerearedfrom Melitomataurea (Say)at Washington, D.

C, March

10, 1879, under Bur. Ent. No. 50X; 5 females reared from Anthophora bomboides Kirby at Ithaca, N. Y., April8, 1912, and April 12, 1921,R. C.Shannon; and 1femalefrom

THE GENUS MONODONTOMERUS — GAHAN 475

Algonquin,111., collected by C. F. Baker and bearing- his note No.

3845.

Aswillbe seenfi-omthe citedsjmonymy,thespecieshas been con- fused in literatme, at least ia one instance, with montivagus. It is possiblethat other publishedrecoi'ds

may

also refer to this species.

10.

MONODONTOMERUS

BAKERI, newspecies

Most

closely resembles emarginatus but

may

be distinguished at once

by

the nonemarginatethird tergite as well asbyother characters pointed out inthe remarksfollowing the description ofemarginatus.

Also resembles montwagits but difi'ers

by

having a longer malar space,bytheabsenceofamalargroove,bythemore convexface,by thelongerocellocularline,andin thepurplishcolor ofthepronotum andprescutum.

Female.-

—

^Length4.7

^mm.;

ovipositor 2.4

mm. Head

bluish green, tinged with purplish on vertex; thorax bluish green, pronotum and prescutum stronglytinged with purple andwithsome purplish tints onpleura; coxae concolorous withthorax, with some purplish tints;

posterior femora metallic bluish, slightly diluted with testaceous, medianand anteriorfemora brownishtestaceous; all tibiaeand tarsi testaceous; wings hyaline with a

weak

infuscation at stigmal vein;

antennal scape and pedicel dark brownish tinged with metallic, the extremebaseofscapetestaceous; flagellum brownishblack;mandibles testaceous;

abdomen

brownish black, with

weak

metallic and viola- ceousreflections.

Head

appearing rather thick anteroposteriorly, the temples less strongly receding than usual; eyes practically bare; ocellocular line nearly twiceaslongasdiameterofa lateral ocellus;malarspace equal to alittlemorethanhalfheightofeye;malargroove entirelyabsent;

face below antennae distinctly swollen, especially convex medially;

mandiblewith thetwoventralteethsubequal; clypeusnot protruding;

antennaeinserted alittlebelowalineconnecting lowerextremities of eyes;scapenot quite attaining level of anterior ocellus; pedicelabout oneandone-halftimes aslongasbroad;ring joint large,about twice asbroad as long;firstfunicular jointsubquadrate, following joints of funicleallalittlebroader thanlong;clubnotthickerthanfunicleand a little longer than two preceding joints combined. Integumentof head rather strongly and nearly uniformly shagreened but with a smooth areaalongposterior orbit atlower extremity of eye.

Thorax inclusive of

propodeum

about twice as long as broad, strongly shagreened, the rugulaeon mesoscutum and scutelluminter- mingled withnumerous shallow pits or punctures; scutellum longer than broad, reticulately sculptured behind transverse groove, the punctate marginal groove- continuous around apex; postscutellum faintly sculptured and with a delicate carina inmiddle;

propodeum

47

1) PROCEEDINGS OF

THE

NATIONAL

MUSEUM

vol.do

with median depression triangular, area betv/een thisdepression and spiracidar sulcus strongly sculptured. Tooth on posterior femur shortandbluntandlocatedatapproxuTiatelyapical one-fifth offemur.

Anterior wingextendingwellbeyond apex ofabdomen;submarginal, margiiuil, postmarginal, and stigmal veins approximately in the proportionsof 40,17, 9, and6,respectively.

Abdomen

alittlelongerthanhead andthorax,compressed, wealdy reticulated on the sides; first tergite dorsally perfectlysmooth, and comprising a littleless than one-third length of abdomen, second to fifthtergites dorsallyweaklytransverselyacicuiated,thesecond about half aslongas thefirst, thirdandfourtheach alittlelongerthanthe second,fifthaboutaslongasthesecond,sixth tergite finely reticulately sculptured and clothed with suberect hairs, ovipositor as long as abdomen.

Male

unlaiown.

Typelocality.

—

_{"AmileHill," Colo.}

T?/p^.—U.S.N.M. No. 54266.

One

femalecollected byC. F.Baker andbearinghisfieldnotebook No. 1330.

The

noteunderthis

number

statesthat thespecimen

was

collected inJulyatAmileHill innorthern Colorado.

The

localityis

presumed tobein theneighborhoodof FortCollins,and the timeof collectionwasprobabl}^July 1894.

11.

MONODONTOMERUS

EMARGINATUS,newspecies

The

deepand broad emarginationofthethird tergitedistinguishes this speciesatoncefromallotherspecies inthecollection.

Female.

—

^Length4.2

^mm.;

^{ovipositor2.1}

^{mm. Head}

^bluishgreen;

dorsum

ofthe thorax greenish black;pronotum,propodeum, mesepis- ternum,and coxaeweaklytingedwith purple; mesepimeronpolished greenish black; all femora metallic bluish; all tibiaeand tarsitesta- ceous;

abdomen

black,tingedwithmetallic;antenna! scapemetallic, flagellumblack;wingshyalinewith adistinctfuscouscloudatstigmal vein.

Head

moderately thick anteroposteriorly; ocellocular line very slightlylongerthan diameterof lateral ocellus;eyespracticallybare;

malar space very nearly equal to halflength of ejQ) malarfurrow effacedexceptfora short distanceateyemargin;mandibleswith the twolower teeth subequal; anteriormargin of head straight, clypeal margin not protruding; face slightly swollen, especially prominent just below antennae; antennae inserted on a line connecting lower extremities of eyes;scapenot quite attaining level of anterior ocellus, distinctly sculptured; pedicel a little longer than broad; ring joint large,abouttwo-thirdaslongasbroad;firstjoint offuniclequadrate, secondtoseventhfunicular jointsall

somewhat

transverse,the seventh

THE GENUS MONODONTOMERUS — ^GAHAN 477

about twiceasbroad aslong;club3-joiuted, ovate,not broaderthan funicleandalittlelongerthantwoprecedingjointscombined. Sur- face of head nearly uniformly shagreened but with a smooth area alongposterior orbit atlowerextremityof eye.

Thorax abouttwiceaslongasbroad, sculpturedaboutliketheliead;

scutellum longer than broad, its surface behind transverse furrow nearly smooth medially but distinctly though weakly aciculately sculptured laterally;punctate groovesettingoff marginal frenum on scutellum not interrupted; postscutellum witha

weak

mediancarina;

median depression on

propodeum

triangular, area between median depressionandspiracularsulcus distinctlythoughnot stronglyreticu- lated. Tooth onposteriorfemurshort, broadat base,andlocatedat approximately apical one-fifth of femur. Anterior wing extending beyond apex of abdomen; submarginal, marginal, postmarginal, andstigmalveins inapproximately theproportionsof 35,16, 8,and5, respectively.

Abdomen

about as longas head and thorax, ratherstrongl}^com- pressed; distinctly reticulated onsides, more weakly sculptured dor- sally; first tergite perfectly smooth dorsally, comprising approxi- mately one-third length of abdomen; second dorsally about half as longas firstand weaklyaciculated;thirddeeplytriangularlyemargi- nate at middle, sculptured aboutlike second; fourth sculptured hke second, not emarginatc medially, and aboutas long assecond; fifth tergite shorterandpracticallysmoothdorsally; sixth aslongas fifth, distinctly sculptured and completely clothed with suberect hairs;

ovipositoraboutas longas abdomen.

Male

unknown.

Typelocality.

—

Radium,Colo.

Type.—V.^.^M.

No. 54267.

Described fromone femalesaid to have beenrearedfrom thenest ofa leaf-cutterbee {IMegachile) collected inanaspen log in 1922by E.Bethel.

The

type is a slightly broken but apparently normal specimen greatly resembling the

new

species hakeri described in tliis paper.

Besides having the third tergite emarginate, it differs from hakeri by having ^the malar space

somewhat

shorter, the ocelli less distant from the eye margin, the cloudⁱⁿ the forewing at thestigmalarger and darker, and the dorsum of the thorax not purplish except^toa slightextenton thepronotum.

12.

MONODONTOMERUS

DENTIPES(Dalman)

Torymus dentipes Dalma\, Svenska Vet.-Akad. ^{Handl., vol. 41,} pp. 173, 178, p\.7,figs. 23-25, 1820.— BoHEMAN, Svenska Vet.-Akad. Handl., vol. 44, p.

335, 1833.

Monodontomerus dentipes (Dalman) Walkek. Ann. Mag. Nat. Hist., vol. 19,p.

227, 1847.

478

PROCEEDINGS OF

THE NATIONAL MUSEUM

vol.90

This species differs from othershaving the apex of the scutelkim smooth

by

having the dorsum of the first tergite distinctly though not stronglysculptured.

Female.

—

^{Length 3.5}

^mm.;

^{ovipositor 1}

^{mm. Head}

^{metallicgreen;}

eyes and ocelli usually reddish; mandibles testaceous; scape and pedicel usually dark metallic, scape sometimes testaceous on basal half; flagellumblack; thoraxmostly darkgreenishwithmedianlobeof mesoscutumblack; coxae and femora darkgreenish; tibiae and tarsi reddishtestaceous;

abdomen

black with afaintgreenishtintespecially on dorsum of first tergite and on apices of following tergites;wings hyaline with a weakly fuscous spot embracing stigmal vein; tegulae metallic. Vestiture on dorsum of thorax broAvnish, elsewhere apparently^paler.

Eyes conspicuously pilose; ocellocular line barely longer than diameter of lateral ocellus; temples nearly transverse to body ^axis;

malar space equal to about one-fourth of eye height, malar furrow complete;mandiblestridentate, teethshortand subequal;facenearly

flat,marginofclypeus veryslightlyprotrudingbeyondanteriormargin of face. Antennae inserted distinctly above lowermargins of eyes;

first funicular joint obviously a little longer than broad, distinctly thicker than pedicel; second to sixth joints of funicle very slightly longer than broad; seventh subquadrate; club not thicker than funicleand aboutaslongastwoprecedingjointscombined;scapenot quite attaining anterior ocellus; scutellum about as broad as long, not overlapping postscutellum, perfectly smooth behind transverse furrow, foveolate groove setting off marginal frenum on scutellum uninterrupted medially; postscutellum with a strongmedian carina;

propodeum

distinctly sculptured,with amoderatelydeepandsharply triangular median depression extending from base nearly to apex andbisected

by

alongitudinal carina;toothonposteriorfemurcloser toapexoffemurthan usualandnotso slender asinsomeotherspecies

;

submarginal, marginal, postmarginal, and stigmal veins in approxi- mately the proportionsof 30, 17, 9, and 6, respectively;stigmal vein verylittle thickened and slightly longer than usual; dorsum offirst tergite distinctlythoughnot strongly sculpturedonitsposterior half;

secondtofifthtergites alittle

more

strongly sculptureddorsally than usual; ovipositorsheathsabouttwo-thirdsaslongasabdomen.

Male.

—

^Length2.75

^mm.

^Similartothefemale exceptinthe usual sexualcharacters.

The

identification oftliis speciesisbasedupon twospecimensfrom

Germany

determined as dentipes

by

an unidentified entomologist, possibly Arnold Forster.

Two

other European specimens without localitylabels, one ofwhich is said tohave parasitizedDiprion pini (Linnaeus), are in the collection; also four specimens collected

by

THE GENUS MONODONTOMERUS — ^GAHAN 479

C. R. Kelloggat Foocliow, China, in 1928. Besides thisOld World material the collection contains several largeseries, comprising ov^er 300 specimens, mostlyrearedfromDiprionsimile (Hartig) in Maine, Connecticut,

New

York,

New

Jersey, Pennsjivania, Alichigan, Ohio, andOntario,Canada.

Monodontomerus dentipes was originally proposed in the genus Torymus by

Dalman

accompaniedbyavcjyshort description, which, so faras it goes, fits the presentspecies. Dalman'sspecimens were subsequentlymore fully described by

Boheman,

and the species has mostfrequentlybeencredited tothatauthorbutshouldbecredited to Dalman.

In EuropeanliteratureAlonodontomenisdentipeshasbeenrecorded as parasitizingseveral different species of sawflies and a

number

of species ofLepidopteraandinother instancesas secondarilyparasitic through species of Braconidae, Ichneumonidae, Chalcididae, and Tachinidae. Itisprobable, however, that not alltheserecordsrefer to the true dentipes. Dalla Torre^{^}haslisteddentipes as identifiedby Alayrasa

synonym

of lirens Thomson, andHofl'myer^ has indicated the same synonymy.

IntheUnitedStatesNational

Museum

isone female specimenidenti- fied as dentipes

by Mayr

and another^identifiedby Ruschka. These twospecimensdifferfromdentipes asheretreatedby havingthegroove settingoffthe marginal carinaorfrenum onthe scutellumdistinctly interrupted at the apex of the scutellum, by having the first tergite perfectl}^smooth andsculptureless,b}^the toothonhind femurbeing distinctly longer, slenderer, and fartherfrom the apex of the femur, and

by

having the ovipositer very nearlyas longas the abdomen.

The}^disagreewiththe description of virens

by

havingastrongmedian carina on the postscutellum and in having the marginal groove on the scutellum interrupted.

A

third specimen of

what

is evidently the same form isin the collection. This was taken in

Hungary by

C. Sajo and bears the

name

labelMonodontomerus ohsoletus (Fabri- cius). Itis apparently not ohsoletus,however, since themedian de- pression on the

propodeum

is narrower and moreacuteposteriorly.

The

funicle jointsareall alittle longerthan broad, the toothon the posterior femur is longer and more slender, and the general color is slightl}^

more

greenish than in that species. It is impossible at the present time to identify this form positively and it isdiscussed heremerelytoshowtheprobable confusionexistingregardingsomeof theEuropean species.

*Catalogushymenopterorum,vol.5,p.290,1898.

•Ent.Med,vol.17,p. 258.1930.

480

PROCEEDINGS OF

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NATIONAL MUSEUIVI vol.90

13.

MONODONTOMERUS

JAPONICUSAshmead

MonodontomerusjaponicusAshmead, Joiirn.

New

YorkEnt.Soc,vol.13, p.83, 1904.

Verysimilar to dentipesandagreeingwith the foregoingdescription of that species exceptin the following particulars:

Female.

—

^Length 3 to 3.5

mm.;

ovipositor 0.8

mm. Dorsum

of firsttergite perfectlysmooth andpolished; ovipositoralittlelessthan half aslongasabdomen;ocellocularlinenot longerthan diameterof a lateral ocellus. Scape testaceous, sometimes washed with metallic toward apex;

pronotum

bluish green;

mesoscutum

and frequently the scutellumpurplish;propodeum, pleura, all coxae, and all femora bluishgreen,theposteriorcoxaeoutwardlyoftentintedwith purplish and the middle and anteriorfemorasometimes blacldshwith onlya faintmetallictinge; tibiae brownish testaceousto very dark brown;

tarsi testaceous;dorsum of first tergite bright bluish green, rest of

abdomen

blackishwith aslight bluish tinge.

The

malediffersfromthemaleofdenti/pes

by

havingthefirsttergite smooth,theocellocular linenot longerthanthediameterofanocellus, the face brassy green, the

mesoscutum

purplish, and the posterior tibiaeusually

somewhat

darker.

The

typeof this species isfrom Nikko,Japan, collected

by

Albert Koebele.

Two

other specimens in the United States National

Mu- seum

collection are labeled cotypes but these were collected

by

KoebeleinChina and werenotmentioned

by Ashmead

inhisdescrip- tion. Besides the type material thecollection alsocontams3females and 7 malesreared February4 to

March

5, 1937, at

Nagawa-Mura,

Nagano-Ken, Japan,

by

R.

W.

Burrill from Diprion nipponicum Rohwer.

The

speciesis recorded

by

K. lida^{^}as a parasite of Osmiataurus Smith.

14.

MONODONTOMERUS

SUBOBSOLETUS,newspecies

This species is extremely similar to obsoletus Fabricius. It differs

from the few specimens of obsoletus in the collection, however, by havingthemedian^depressiononthe

propodeum more

distinctly tri- angular,

more

nearly acute posteriorly,

by

having the sculpture laterad of this depressioncomposedof distinctoblique rugae instead of irregular reticulationresembling shallow punctation,

by

having the toothon the hindfemur

somewhat

moreslender, and

by

having the

propodeum

metallic green instead of bluish black and the general color of thethoraxmoremetallic.

Female.

—

^Length2.75 to 3.4

mm.;

ovipositor 0.85 to1.2

mm. Head

metallic green; eyes and ocelli red; mandibles reddish testaceous;

«Kansai Ent.Soc.Trans. Japan, No.3,p.69,1932.