SOME NEW ORTHOPTERA FROM MOKANSHAN, CHINA.

WASH., VOL.

23, 2,

FEB.,

Ctenidia ofabdominaltergites

composed

of small spineswhich are notin close-set rows; genal cteniclium ^ot 6-7 spines; nearctic^{.. 2.}

2. Pronotal ctenidium of46 _spines;

body

of receptacula scminis

more

than 210/xlong

'

schejferiChnpin.

Pronotal ctenidium of36-38 spines;

body

of receptacula seminis ^lessthan

210

M

long... ^3.

3.

Body

of receptacula seminis 184-199 nlong; nine ^bristlesin upper row on

frons

mammoth

_Chaphi.

Body

of receptacula seminis 169 ^/u. long; seven bristles in upper row on

frons.... - dippiei Rothsch.

For convenience, the exact dimensions of the receptacula seminis

in

the three species before me are given

ⁱⁿ

the following

table.

As there are two receptacula

ⁱⁿ

each female

in

the species of

this

genus, two columns of dimensions have been given.

All

measurements given

ⁱⁿ

micra.

Species Anterior Posterior

H.

_schefferiChapin. 215 x 123 230x 138

H. mammoth

Chapin. ^{199 x 138 184 x 154}

H.

_dippieiRothsch. 169 x 108 169 x 108

SOME NEW ORTHOPTERA FROM MOKANSHAN, CHINA.

BY

A.

N. CAUDELL,

^Bureau of Entomology.

Among

^a

consignment of Orthoptera recently received

for

determination from Prof. N. Gist Gee, of Soochow, China, were several forms apparently undescribed.

^All

of these are from Mokanshan, China, and descriptions

^of

them are here given.

Types and allotypes are retained

ⁱⁿ

the

collection

of the U.

S.

National Museum and the paratypes are divided, some being

retained

in

that

collection

and some returned

to

Prof. Gee.

Megaulacobothrus,

^n. gen. (Truxalinae).

Agreeing

closely

with the characters given by Bolivar

^{for his}

genus Aulacobothrus except that the inner

^calcaria

of the pos-

terior tibiae

are equal. The species

is

decidedly larger however than any of those placed

ⁱⁿ

the above genus by

^its

author, and there

is

probably

^little

relation between the two genera,

in spite

of the similarity of characters.

Description, male

and

_female. Vertex moderately^{acute in} both_sexes, some-

what more

so in the male; above slightlyconvex and without median carina;

fevolae distinct,wholly ^visible from_above, about threetimes aslong ^as broad

in the maleandslightly ^{less in} the female; antennae_filiform,thoseof the male

more

thantwiceaslong^asthehead and

pronotum

combined,those of the female scarcely twice^aslong;^frontalcosta nearlyflat,

somewhat

concaveatthe_ocellus, the sides converging almost uniformly, sometimes

more

_rapidly towards the

WASH., VOL.

23, 2,

FEB.,

vertex in the male, the point where itmeets the vertex being narrowerin the male than in the female,ⁱⁿ the former _{not,or barely,} broader than the basal segment^{of the}antennae; ^face moderately declivous.

Pronotum

with distinct

median and

lateral carinae, the formercutat, male, or a^liftle behind, female, themiddle

by

the principal transverse sulcus,whichalsocuts thelateralcarinae;

lateralcarinae converging ⁱⁿ the anterior third

and

then diverging ^to the pos- teriormargin^{of the}pronotum, ^thebroadest part of the disk being abouttwice as broadas atthe narrowest point; anteriormargin of pronotal disk truncate, posteriormarginobtuse-angulate;^laterallobes quadrate.

Organs

^offlight fully developed, the tegmina and wingsof equal length, extendingto, or barely be- yond,^thetipsof the posteriorfemora;tegmina^{of the} male withthecostalarea decidedly broadened,^the transverse veinsparallel ami_diagonal,growing

more

transverse towards the apex of the area; intercallary area subequal ⁱⁿwidth, about as broad as the ulner area at its widest point, intercallary vein absent;

wings^lessthantwiceas long^as broad, themargins evenly rounded,^{as a}whole, but with moderate undulations between eachradiate vein, a

more

decided notch at the terminus of the first one. Legs moderately ^slender; posterior femora flattenedon theouterface, the carinae well elevated; posterior^tibiaewith the inner apical calcars equalⁱⁿ length

and

_scarcely

more

than halfas long ^as the inner ones,

and

similarlyshaped.

Abdomen

moderately compressed; supraanal plate apically pointed,

more

sointhe male, the^sides

somewhat

_{rounded;subgeni-}

talplate ofmale apicallypointed

and

directedupwards,^{thatofthe femaleflat} andhorizontal

and

apicallynarrowlycleft; cerciofbothsexesconical,

somewhat more

_elongateinthemale; valves of ovipositor short,free,themargins smooth.

Type. Megaulacobothrus fuscipennis Caudell.

In the key

^to

genera of the Truxalinae given by Bruner

¹

this

genus

^falls

under Stenobothrus on page

^122.

But

it is

amply

distinct

from that genus.

Megaulacobothrus

fuscipennis, ^n. sp.

Description,male

and

_female. Size_large.

Head

asbroadasthe anterior por- tion of the pronotum; eyes elongate, apically pointed above, reddish brown, unicolorous; occiputwithout carinabut with amesial light stripe borderedon eachside by ^a black one,

and

below _that,on each _side, with oneor two

more

alternate black

and

lighter stripes,varyingⁱⁿdistinctnessindifferentspecimens;

antennae dark brown,^often lighter basally,andconsisting ofabouttwenty-five or twenty-sixsegmentsⁱⁿthe male,^allbutthe apical four orfive,whicharevery smallandshort, being elongate;ⁱⁿthefemale probably^ofaboutthe

same num-

ber ofsegments, though^intheonly^entireantennaofthissex

examined

_{the apical} ones are fused into one long indistinctly divided segment.

Pronotum

_light

brown

in color,the diskwiththelateralcarinae

marked

inyellowand margined outwardly along themiddle and inwardly behindwith fuscus;^laterallobeswith

some

obscure_lightcoloredcallouses.

Abdomen

blackishabove and_laterallyat the base, the black giving

way

laterallyalong themiddletoyellowishandthe apical '"Revision du

Systeme

^desOrthopteres^etdescription des especies rapportees par

M. Leonardo Fea

de

Birmania"

(Ann.

Mus.

Civ. Stor.Nat.

Geneva,

^Vol.

xxxiii (2a,xiii),p. 1-230,pi.i-vi(1893).

WASH.,

23, 2,

FEB.,

¹⁹²¹

29

half blood-red, especiallyabove and_laterally,beneaththe yellowish cast continu- ing furthertowardsthetip. Foreand middle_legs brown, ^thetibiaeonly

armed

withsmall black teethon eachsidebelow;hindfemora

brown

onthe outer_face, sometimes withalittledarker

marking

along themiddleanteriody, the genicula- tion blackish, the inner face light

brown

withoneortwostrongly diagonal black bands,and below merging^{intothe color}of the ventral surface,whichisuniformly blood_red;posterior^tibiae blood redwithblack tippedspines, abouta do/en to fourteenon eachdorsal carina.

Nymph

^withoutspecialfeaturesdifferent from theadult except that the

abdomen

isnot redandthehindtibiaeare infuscated inthemiddlehalf.

Length, antennae, male, 15

mm.,

female, 14

mm.;

_{pronotum, male,} 5

mm.,

female, 6

mm.;

elytra,male,20

mm.,

female, 23

mm.;

posterior femora, male, 16

mm.,

female,^18.5

mm.

Described from

six

males, type and paratypes A

to

E, four females, allotype and paratypes F

to

H, and one male nymph, paratype

^I.

Type, allotype and paratypes, A, B, C, F, G and

I in

Collec-

tion

U.

S.

National Museum; paratypes D, E and H returned

to

Prof. Gee.

Catalogue No. 22971, U.

S.

N. M.

Geea,

^n. gen. (Truxalinae).

This genus runs

ⁱⁿ

the keys of Brunner's 1893 paper

^to

Parapleuras on page

^121.

But

it is

not very

closely allied to

that genus, which

is

now relegated

to

the synonymy under Mecostethus Kelch. The

_slightly

expanded and

_parallel

veined scapular area of the tegmina might lead one

^to

the genus Pnorisa

in

Brunner's key. But there

is little

relation between the present genus and that African genus of smaller

^locusts.

Description,female,^the male unknown.

Head

with the face rather strongly retreating; fastigium of the vertex slightly acute-angulate apically, extending

beyond

the eyes a distance equal^toaboutits

own

width, dorsallysulcate,with- out

median

carinae, themarginsobtuse; fevolae absent; frontal costawithsides parallel above the _ocellus, below which _point they diverge moderately ^to the clypeus,whichthey barely reach;abovethe ocellus the costaisnotatallsulcate, belowandatthe ocellus verymoderatelyso;occiputmoderatelyswollen,smooth;

antennaetriquetrousanil slightlyflattened_basally,

beyond

becomingcylindrical.

Pronotum

_{scarcelylonger}than_{the head,}withoutlateralcarinaeand with

median

carinadistinctonlyon the

metanotum,

^andthere veryslight;diskrounded, an_

teriormargin roundly truncate, the posteriormargin obtuse-angulate, the _tip rounded;^laterallobessubquadrate, the lower-posterior angle rectangular;meso-

and

metasternal interspaces quadrate.

Abdomen

with the valves of theovi- positor well exerted, thescoop^{of the}upper^valvesabout as loimasdeep; supra- anal plate dorsallyroundlyconvex, apically semicircularly rounded;cerci alittle

more

thantwiceaslong^asbasally broad. Organsof flight fullydeveloped, exceed- ing

somewhat

the_tipsof the posteriorfemora; tegmina apically rounded with-

WASH., VOL.

23, 2,

FEB.,

out intercallary vein,scapular areavery slightly expanded, the veins _parallel;

wingsunicolorous,withveinsnot swollen. Legs moderatelyslender;^all femora

unarmed

both aboveandbelow, the geniculationsrounded; ^tibiaespined above only, theposteriorones with twelve tofourteen spinesⁱⁿ the outer_series, none next the apical spur.

Type. Geea conspicua, Caudell.

Geea

conspicua, ^n. sp.

Description, fema/e,^the maleunknown. Thisisalarge

showy

^locustofagreen

and

black, ordark brown,^colorinstrong contrast.

The

entire

body

^isblackish above,growinglighter laterally,the clypeus

and

lowerpart of theheadgreenish, the breast

and

lowersurfaceof the

abdomen

brownish; antennae,^ofwhich all

but11

mm.

of the basal portion^ismissing, entirely piceous

and

_{the eyesbrown;}

pronotal disk with amoderately broad

median

_stripewhich continues_slightly on to the occiput, vanishing ^before reaching the eyes; the eyes are narrowly margined withyellowandthe anterior aspect of the vertex^isof the

same

_color,

and

astreak of yellowextends

down

eachsideof the_face,from the base of the antennae ^to the outer margins ^{of the} clypeus; ^{ocelli red.}

Tegmina

^almost entirely

membranous,

slightlycoriaceous basally, dark

brown

in color except the anal margin, which ^is bright green ^for the entire length, reaching ^to near the _tipof thetegmina,wings uniformlyhyaline, the

membrane made

_dusky

by

innumerable microscopic black specks, and a _slight greenish tinge along the anal margin; the veins black. Fore

and

middle _legs bluish green, the femora yellowish ventrally; hindfemoragreenontheouter_face,yellowishbeneathand on the inner_side, the apex^black

and

with a preapical blackband; hind ^tibiae dark blue with abroad subbasal greenishyellow band, the spines light in the basal half

and

_piceousin the apical half; tarsi light yellowish with_slightdark variegation.

Length,pronotum, ⁷

mm.;

tegmina, ³⁵

mm.;

posterior femora, 22

mm.

Described from a

_single

female, the type.

Type

ⁱⁿ

Collection U.

^S.

National Museum.

Catalogue No. 22975.

Phlaeoba

brachyptera, ^n. sp. (Truxalinae).

The abbreviated wings of

^this

species

^will

serve

to

distinguish

it

from the other members of the genus,

^to

none of which

it

appears very

closely ^allied.

Description, male

and

_female. General color wood-brown.

Head

about as long as the

pronotum

ⁱⁿ the male, noticeably shorterⁱⁿ the female; vertex acuteangulate ⁱⁿ male, rectangulate ⁱⁿ female, extending

beyond

^the eyes ^a distance alittlegreaterthan the interocular space, dorsally shallowly sulcateⁱⁿ frontof the eyes,convexposterior of that point, the transitionfromtheconcave to convex _being sudden and conspicuous; there is a distinct median carina extending ^for the entire length of theconcave portion of the vertex and con- tinued

some

distanceback ontotheconvexportion; faceveryrapidly retreating intheupperpart,

more

gradually below;^frontal costa persistentand _{very nar-} row,expanding

somewhat

_{below, the}sidesaboutaselevatedasthelateral facial

PROC. ENT. WASH., VOL.

23, 2,

FEB.,

carinae, with which theyare subparallel; eyesabout one

and

one-half times as long ^as broad, diagonally situated,

when

viewed _dorsally, and

brown

in color, obscurelymottled withdarker; antennae very moderatelyensiform, longerthan thehead

and pronotum

together.

Pronotum

with

median

andlateralcarinae, thelatter parallel to near the anteriormargin ^{of the} disk, where they diverge briefly; anteriormarginof pronotal disk truncate, the posteriormargin obtuse angulate;^laterallobessubquadrate. Organs^offlight

more

abbreviatedthanin theother species of the genus, fallingconsiderably short of the tipsof the pos- terior femora,ⁱⁿ male _scarcely passing the middle of the hind _femora, in the female attaining ^to about the base of the apical third; tegmina ^{a little}longer than the wings, thetipsrounded,^notaccuminate,^{the costal}margin moderately

expanded

subbasally; nodistinctintercallary vein,though such ^isindicated by a disconnected

median

series of_veinlets; wings hyaline with the longitudinal veins black, the costalandapical areas being

somewhat

infuscated. Legs^slen- der, brown; ^hind femora moderately ^{swollen in basal} half, the dorsal margin carinate and with a few dark _specks,

unarmed

both above

and

_below, the geniculations blackish, the angles^brieflyangulate, asharp

median

point termin- ating thefemoraapically;hindtibiae

brown

withabluish_tint,the spines ten or elevenon each_side,

and

with the apical half piceous. Supraanalplate ofmale elongate rectangular, very slightly

and

briefly sulcate longitudinally above;

subgenital platenarrowly pointed above;^cercisimpleand pointedⁱⁿboth_sexes,

more

_elongateⁱⁿ the male,whereitisfully four timesas long^asbasallybroad;

lastdorsalsegment^of

abdomen

ⁱⁿfemale elongate,abovebasally flattenedand laterally carinate, mesially shallowly concave; ^{last ventral} segment elongate, broader behind, with ^a barely noticeable

median

carina, the posteriormargin truncatewitha

median

briefobscuretooth projectingbetweenthelowervalves of the ovipositor, the ^lateral margins ^ofthis segment are posteriorlyrounded;

valves of ovipositor well exerted,unarmed,^thescoop^{of the}upper ones compris- ingabouthalf the length.

The

anal field of the tegmina

and

the disk of the

pronotum

^{in themaleare}

lightercolored than therestof thegroundcolor,giving a generalappearance^{of a} broaddorsalstripe; this

may

probably ^{be true also in}

some

_{females, though}in thesingle specimenof that sex

now

available forstudy ^{it is not.}

The

lateral lobes of the

pronotum

^{in two}of the three males

examined

are blackishabove, especially borderingthe lateralcarinae, while ⁱⁿ the female andthe third male this is true only ^to a lesser extent. There is a narrow

and

_usually obscure postocular dark _{stripe present} on the head,^anil there issometimes a greenish tintonthesternum and on the lower surface of thefore

and

middlefemoraand tibiae.

Length, pronotum, male, 4

mm.,

female,^5.5

mm.;

antennae, male

and

_female, 12-13

mm.;

tegmina, male, 10

mm.,

female, ^12.5

mm.;

posterior femora, male, 11

mm.,

female, ¹⁵

mm.

Described from three males, type and paratypes A and B, and one female, allotype.

Type, allotype and paratype A

in

Collection U.

S.

National Museum. Paratype B returned

to

Prof. Gee.

Catalogue No. 22973, U.

S.

N. M.

32 PROC. ENT. WASH., VOL.

23, 2,

FEB.,

Chrysochraon anomopterus,

^n. sp. (Truxalinae).

Description, male,female unknown.

Very

^likejaponicus ^Bolivar

and

_genicul- aribus Shiraki, but does not agree with eithersufficiently well tobe considered identical. Itdiffers from boththe above mentionedspeciesⁱⁿlacking a longi- tudinal stripeof

brown

on thesides,the entire insect beingan almost uniform brownish_yellowcolor, faintindicationsof dorsalandlaterallongitudinalstripes on _{the head,}andthe genicular^arcsof thehind femora_{are barely}darkened; ^the spines of the^tibiaeareblackinthe apicalhalf;there areno_spinesonthefemora;

the hind tibiae slightly

more

clear yellow than the rest of the insect.

The

FIG. ¹

Tegmen

^ofChrysochraon anomopterus.

antennae ^are noticeably flattened ⁱⁿ the basal third

and

_{are longer} than the head

and

thorax.

The

_tegmina ^are

much

broadened inthe apical half

and

the tip truncate

and

mesially notched, ^as

shown

in the

accompanying

figure; the hind wingsare aborted, being decidedly shorterthanthe thorax.

The

cerciare simple, cylindrical

and

pointed, ^as long ^as the flat triangular apically pointed supraanal plate; subgenital plate with the _tip broken off. Mesosternal inter- space

more

thantwice aslong^asbroad, themetasternallobesbutlittlesepara- ted.

Length,

pronotum,4 mm.;

antennae, about 10

mm.;

tegmina,^12.5

mm.;

^hind femora, 13

mm.

Described from a

_single

male, the type.

Type

ⁱⁿ

Collection U.

^S.

National Museum.

Catalogue No. 22974, U.

S.

N. M.

Catantops viridifemoratus, ^n. sp. (Acridinae).

This rather pretty grasshopper

^is

placed

ⁱⁿ

the above already unwieldy genus with considerable doubt.

It

runs

to

that genus

in

the keys of Brunner, however, and the specimens show no characters incompatible with those of Catantops.

Description, male

and

_female. General color brownish.

Head

greenish

brown

with broad black postocular bands

and some

small maculationson the occiput, varyingin size,positionand number, sometimes forming ^arather uni- form dorsal infuscation; eyes large and globose, especially ⁱⁿ the male where they^arebutalittlelongerthan broadwhileinthefemale they^arealmosthalf as long again ^as broad; frontal costaentending almost ^to the clypeus, sulcate only ^at

and

below the ocellus, the sides parallel, orconverging slightly at the ocellus; interocular space approximately ^as broad as the frontalcosta, slightly narrowerin themale than in the female; vertexlightly sulcateabove, without

median

carina,anteriorlymeetingthe face roundly,ⁱⁿthemale with_{a scarcely}

PROC. WASH.,

23, 2,

FEB.,

perceptible angulation; antennae of female _slightly compressed, yellowish

brown

incolor

and

abouttwiceaslong^asthepronotum,^inthemale absent from thesinglespecimen^seen.

Pronotum

yellow greenish

brown

on thesidesanda little darker _{above, the}sites of the lateral carinae

marked

_by a broad black stripecontinuous with the postocular^stripesof thehead;pronotal disk truncate anteriorly,roundlyangulate posteriorly,rounding^into themoderatelyelongate laterallobeswithout forming^lateralcarinae exceptverybluntly soon themeta- zona;

median

carinaeveryslight,especially ⁱⁿthe female, a^little

more

distinct inthe male; prosternal spineconical,apicallybroadly rounded;mesosternalinter- space veryslightlylonger thanbroad in the male, a^little broader than _longin the female. Legs moderately slender, the hind femora moderately swollen basally; the color of the legs ingeneral ^isgreenish, the outer face of the hind femora verynoticeably so, the tibiaewith a bluish_cast, thoseof the posterior legs being decidedly blue; the posterior femora _apically

and

corresponding tibiaebasallypiceous, the femora

marked

_{dorsally by}abroad medial

and

_pre- apical band, sometimes

somewhat

obscured but _usually very noticeable,even conspicuous; spines ofhind tibiaeblack in apicalhalf,yellowish basally, ten ^to twelveintheouter_series,the basal twoor threeminute. Organs^offlight fully developed, but barely or scarcely attaining ^to the _tips of the posteriorfemora;

elytrabrown,^{the costal}marginbasally infuscated, intercallary areanarrow and with a distinct intercallary vein; wings moderately

and

uniformly fuliginous, the veins black.

Abdomen

greenish yellow,withafew blackmarkingsapically;

supraanal plate of male triangular, black on the greater part of the

median

portion, the _tip and base only light and with a narrow

median

longitudinal stripe, broadly sulcate medially ⁱⁿ the basal third and narrowly ⁱⁿ the apical third,and

more

broadly^sofor the entire lengthon eachsideof themedial fur- rows;on eachsideof thenarrowapical

median

sulcationisa pair of raisedlongi- tudinal carinae, short

and

black;subgenital platewiththeuppermargin^thin

and

forming^abrief,acute,depressed andposteriorly directed point, the apical ^half ofthisplate^ismottled with blackish; fercula

mere

roundedlobesshorter than thelastdorsalabdominal segment from which^theyarise,butratherconspicuous fromtheir color,whichisblack,ⁱⁿdecided contrastto the yellowish color of the surfacebeneath them;^cerciofmalesimple, apically clavate,shaped^as

shown

in the _figure (Fig. 2), the whole cercusextendingslightly

beyond

^the tip of the supraanalplate

and

isblackon the apically

expanded

portion,exceptalong the lower margin;just

beyond

^thetipof thesupraanalplate;betweenitand the_tip of the subgenital plate, the integument ^{of the}

abdomen

forms an erect blunt tubercle; cerci offemale about twiceas long^as basally broad,conical, usually tapering

more

_rapidly ⁱⁿ the basal _half, apically narrowly rounded; ^valvesof ovipositor well exerted, themargins withoutserrations, orwith very rounded

FIG. 2 Cercusof('.aitinti.psoiridifemoratus^.

34 WASH., VOL.

23, 2,

FEB.,

ones ontheuppervalves,wherethescoop^isaboutaslong^as the basal portion;

lastventral segment ^{of the}

abdomen

of the female_longer than _broad, with a

median

apical angulation projecting betweenthelowervalvesof the ovipositor,

and

on eachsideofthis

median

angle there areemarginations forminga flattened triangular lobeon eachside,overlying the^lateralapophystegalplates.

Length, antennae, male ^?

mm.,

female, 14

mm.;

pronotum, male, ⁵

mm.,

female, ^7.5

mm.;

tegmina, male, ^15.5

mm.,

female, 20

mm.;

posterior femora, male, 13

mm.,

female, ^16.5

mm.

Described from one male, type, and

five

females, allotype and paratypes A

to

D.

Type, allotype and paratypes A and B

ⁱⁿ

Collection U.

S.

National Museum; paratypes C and D returned

to

Prof. Gee.

Catalogue No. 22972 U.

S.

N. M.

Drymadusa mokanshanensis,

^n.sp. (Tettigonidae, Decticinae).

Description, male

and

_female. Color almost uniformly yellowish green, probablygreen^inlife.

Head

^asbroadasthepronotum; fastigumof the vertex narrower thanthe basal segment^{of the} antennae, from^afrontviewtriangular, thenarrowpointtouching^thefastigum^{of the}front;basalsegmentof the anten- nae verybroad, thesecond intermediate betweenthe basal

and

the succeeding ones, whichare cylindrical

and

_{very graduallygrowing}smallertowardsthe _tip of theantenna;^theendsarebroken fromtheantennaeof theonly two specimens

known;

eyes moderately protuberant, semicircular

and brown

in color. Pro-

notum

with lateral carina roundly presentonly on ^the

metanotum,

^{where the} disk ^isflat,the restbeingrounded, the anteriormargin truncate, the posterior margin broadly rounded;^laterallobesaboutas high^asbroad, thelower margin inclined anteriorly, the posterior-inferior angle rounded, the humeral sinus shallow; prosternal spines longand_sharp;meso-

and

metasternallobes pointed, thefirst

more

thantwice as long^asbasallybroad, the^latterscarcelylongerthan broad.

Abdomen

_{plump,slightly} compressed; supraanalplate^otmale with an apicalu-shapednotch, the resulting points triangular, that of the female_small, triangular

and

_dorsallysulcate,withablack spot situated mesially;^cerciofmale sub-cylindrical, tapering, apically gently incurved, thewholefiveorsixtimes as long as the basal width, a prominent broad triangular tooth situated on the innerside ataboutthe basal fourth, thetipofthistooth being black,sharp

and

decurved; ^cercioffemale_simple,cylindrical,gradually tapering ^toa point

and

fiveorsixtimes as long^asbasally broad;subgenital plate^otmale forming^along hollow,perpendicularsided scoop, verntrallyconcave withalow

median

carinae

and more

prominent margins,^thetip triangularlynotched_mesially and_bearing a pair of simple cylindrical taperingstyles aboutsix timesas long^as the basal width;subgenital plate of thefemale

much

smallerthan thatof the male,^flat below, theapex broadly notched

and

turned

outward

soas toform adiagonal lateralfurrow; ovipositornotquite three-fourths as long as the posteriorfemora, gentlydecurved and withthe_tipdiagonally truncate. Legsslender;fore tibiae with four long dorsal spineson the outermargin ^{in the} male and threein the female; middle tibiae withseveral dorsal spines on each margin ⁱⁿ both sr\is;

hindtibiaewith

many

^dorsalspines,^allof thetibiaebeing

armed

belowon both

WASH., VOL.

23, 2,

FEB.,

margins, ^all spines black ^at the _tip and along the lower margins, those of the posteriorones

more

conspicuously black; anteriorandintermediatefemorawith blunt blackish teeth on the anterior margins only, the posterior femora _long

and

strongly swollenⁱⁿthe basal two-fifths,

armed

belowon both margins^with afew short piceous teeth; plan^{tula of}posterior tarsus^freebut_short,aboutone half as long ^as the 'basal tarsal segment. Organs ^offlight fully developed, extending^toor

beyond

^thetipsof the posteriorfemora; tegmina broader^{in the} male than inthe female, greenish ⁱⁿ both sexes

and

with the

main

veinsin the female blackish basally;

tympanum

^{ofmale abou! as}long

and

broadas the pro-

notum;

wings clear hyalinewith agreenish castalong ^anarrow costal strip ⁱⁿ the apical half of the wing, the longitudinal veins mostly dark ^colored.

Length, pronotum, male, ⁸

mm.,

female,^9.5

mm.;

tegmina, male, 47

mm.,

female,42

mm.;

posterior femora, male, 34

mm.,

female,36

mm.;

cerci,male, 4.5

mm.,

female, 2.75

mm.;

anal _stylets,male, 2.75

mm.;

ovipositor,23

mm.

Described from one male and one female, type and allotype.

Type and allotype

ⁱⁿ

Collection of the U.

S.

National Mu-

seum.

Catalogue No. 22976.

The

collection

contained an adult male and a male nymph of

another species of

this

same genus which seems

allied to

the one described above, except that the

^cerci

and anal

_stylets

are shorter and there are other characters, both structural and colorational, that indicate

_specific

distinctness from mokanshanensis. The absence of

alllegs,

except the right

^fore leg,

from the only adult specimen makes determination

_difficult,

and

it is

deemed best

to

leave

this

form unplaced

^until

more and better preserved material

is

obtained.

NOTES ON THE ANCESTRY OF THE HYMENOPTERA.

BY

G. C.

CKAMPTON,

PH._D., Massachusetts AgriculturalCollege,Amherst, Mass.

To any one who makes

^a

study

of a

large number

^of

structures from

different

parts of the body,

ⁱⁿ

attempting

^to

determine the

origin

and

affinities

of the various orders of

_insects,it

very soon becomes apparent that

it is

utterly impossible

^to

arrange the

lines

of descent of the insectan orders

ⁱⁿ a

dichotomously branching

^tree

drawn

ⁱⁿ

one plane, since

^several

orders are

fre-

quently connected by mutual bonds

^of

relationship, and many

lines

of descent may converge toward

a

common ancestry, which

is

anatomically intermediate between two or more primitive

groups, and

is

related

to

the one scarcely

lessclosely

than

to

the

others.

If

we disregard the factor

^of

time

_{(i. e.,}

whether one

order was derived from the common ancestral group sooner, or

later,

than certain others derived from the same ancestral

group) and consider the ancestral group from which the others

were derived

as

merely an anatomical "point of origin," the