A new species of Simulium from Texas

OF WASHINGTON, VOLUME

_XV, 1913 133

ground

near Anacostia,

D. C

,

and had been

standing but^littleover a year.

A numberofthe eggs are insertedproximately, ofteninthe

c

Fig. 2. Ovipositor^ofPrionuslaticollisDrury, ^ventralviewc, c'cerci.

pores

which

arerich infoodsubstances.

The

larvae

upon

hatching excavate shallowlongitudinalburrows, then^enter he

wood

trans- versely. This habit of living in woo:l

below

the surface of the

ground

^is shared with _species of the Prionidae

and

doubtless the earth

about

the

wood

servesthe purpose ^of retainingmoisture as doesthe

bark upon

logs

under which many

^{beetlesinsert}their eggs.

The

_drawingsare

by

^{C. T. Greene.}

The

followingpapers

were

_accepted forpublication:

A NEW SPECIES OF SIMULIUM FROM TEXAS.

BY

J. R. MALLOCH.

Simulium

distinctum,

new

_species.

Mule: Black. Antennae _{yellow, generally}more or less brown toward apices; facewithsilvery pollinosity; palpiand_proboscisblack, orbrown.

Mesonotum

deep velvetyblack,withtwosilvery pollinose, slightlycurved lines, which arebroadest at anterior extremities, and extend th3whole length of disk, meeting ^attheposteriormargin^{with a cross}band ofthe samecolor; sidemarginyellowish,withsilvery pollinosity,prescutumyel- low; pleurae opaquegray,yellowishbelow wing^baseon the

membranous

portion^of mesopleura; scutellum black; post-notum ^{black with a silky}

lustre.

Abdomen

withbasal scalevelvety black^orbrown-black, theseg- ment below ^it yellow,the succeedingthreesegments deep velvetyblack;

nextsegment sometimes more^or lessyellowish,and almost_entirelycov- eredwithsilvery pollinosity, which is also noticeable on sides of next segment; apicalsegmentsand hypopygium^black. Legsyellow; fore coxa- slightly, mid and hindcoxae distinctly grayish;hind femorawith _apical half blackened; ^{fore tibia?} darkened towards apices and, ^like the other

tibia?, whitish ondorsal surfaces; hind tibia?withapical half black; fore tarsiblack; mid andhindtarsi with_apicesoffirstand_second, and whole

ofthird tofifthjoints black. Wings^{clear. Halteres}yellow.

Head

normalinshape,the upper eye^facets

much

largerthan the_lower;

face with afew blackhairs.

Mesonotum

with golden pilosity, which is

134

PROCEEDINGS ENTOMOLOGICAL

SOCIETY

not very pronounced, andonlyvisible, under amoderatemagnification, onthe_palestripes,though

more

conspicuouson_posteriorandlateralmar- gins; scutellum with decumbent _{golden pilosity} and upright yellowish hairs;pleursebare except^forthe usualtuftbelow wingbase,which^isnot conspicuous,andconfined toupperangle. Basalabdominal_{fringeyellow,} other abdominal _segments weakly ^haired. Legs strong; surfaces with goldenpile,andscatteredblack_hairs,whicharemostconspicuousondor- sal surfaces; fore^tarsi slender; basal joint more than twice as long ^as second; the pairedapical hairspresentonjoints¹and3,but not conspicu- ous;hindmetatarsus notasbroadashind_tibia,anddistinctlylongerthan the other four tarsal joints together;claws_trifid,wing venation normal.

Length, ^{1 .5}

mm.

Type: Cat. ^no. 15958, U. ^S.

N. M.

Locality: Devils _River, Texas,

May

5, 1907, at light,

(Bishopp and

_Pratt)

Female: Incolorvery^{similar to} the male, but the yellow^is

more

_pre- dominant.

The

fronsandface arethickly covered witha palelavender- graypollinosity;the antennaeare slightlydarkenedatbase;andthe palpi are black.

Mesonotum

with theappearance ^ofhaving^three deep black stripesonabrownish-yellow ground, the intervening spaces covered with thick pollinosity similar to thaton_frons, andthelateralmargins^alsodis- tinctly pollinose; pleurae-black, anteriorly and posteriorlyyellow-brown, with silvery pollinosity; scutellum brown, gray pollinose, post-notum black, withsilkylustre.

Abdomen

withbasal scale yellow; segment^be- lowscale_silvery, on_{apex, laterally;} the othersegmentsyellow, more or lessobscured with brown, andwiththree rows of black_spots. Legs ^col- oredasmale. Wings^{similar tomale. Halteres}yellow. Frons convergent anteriorly, atupperangles almost twiceaswideasat lower; surface hairs sparse, pale; face distinctlylonger than broad, ^itsbreadthslightlymore than equal^tobreadthoffrons atlower margin, haired^{as frons.} Mesono-

tum

with the _pilosity very short, close andhairlike, yellow ⁱⁿ color;

scutellum with_distinct,decumbent_yellowpilosityand_{longerupright}yel- lowhair. Basalfringeof

abdomen

short,yellow. Legs haired^asinmale;

claws _simple.

Length,²

mm.

Same

data as males.

One

_specimen.

Another specimen

^with label, Victoria, Tarn., Mexico,

Decem-

ber 10, (F. C. Bishopp),

though

smaller agrees in other particulars with the _allotype. , I

do

not

know

of

any

recorded occurrence of

Simulium

at _light,

and

it

seems

_strange that _species

which

nor- mallypreferthe sunshine should beattractedin this

manner.

OF WASHINGTON, VOLUME

_XV, 1013 135

TWO NEW SPECIES OF BORBORID/E FROM TEXAS.

BY

J. R. MALLOCH.

Leptocera

(=Limosina)

^mitchelli,

new

species.

Male: Black, shining, but not _glossy. Thirdjoint ^of antennae, face,

andcheeksmoreorlessdistinctly reddishbrown. Legs brownish. Wings smoky; ^veins brown. Halteres brownish _yellow.

Frons aboutaslong^asbroad,opaqueexcepton_orbits;3outwardly^di- rected, orbitalbristlespresent; thecenterrowsconsist of4bristleseach whichareofabout equallength;antennaenormalinsizeand_shape;arista nearly bare, ⁱⁿlength about If thewidth offrons;cheekabout equalⁱⁿ height to the width of third antennal _joint; vibrissa strong, situated slightly above

mouth

margin; posterior to the vibrissathereis ashort bristlesituated about

midway

^fromlowermargin^toeye margin,and the usualmarginal ^bristles are distinct; face concave; eyes elongate ^oval.

Mesonotum

with only onepair^ofprescutellar, dorso-centralbristles,and the disk thickly coveredwithshort_setulaB; pleurs glossy; sterno-plura withtwobristles neitherofwhichisexceptionally long; scutellum with fourmarginal^brisles and thediskcovered withshortsetula?.

Abdomen

with numerous surface hairs;

hypopygium

large, ^its surface covered withshort hairs. Legs covered withshort hairs;midtibiawithfour to five bristles on thedorsal surfaces,the_{pair at}aboutapical third strong- est, and one ventralbristleat below_middle;basal joint ^of hind tarsus barely longer than broad; seconddistinctly longer than broad. Wings with firstcostal division two-thirdsas long ^assecond; second subequal with _third, or slightly shorter; basal section ofthird veinnothalf as long as^last sectionofsecond; outercross vein upright, at slightlymore thanits

own

_length from_inner; last sectionofthirdvein_straight,'end- ing before wing tip; costa extending ^well beyond end ^{of third} vein;

fourth andfifthveins indistinct from outer cross vein.

Length, ¹

mm.

Type and

paratypes: Cat. no. 15972. U. S.

N. M.

Locality: Victoria, Texas. 10-9-1907. (September?) (J.

D.

Mitchell)

"on Bumelia

lanuginosa." Five specimens.

Allied to ferruginata Stenh.,

which

is cosmopolitan ^initsoccur- rence,

and

is

common

ⁱⁿ

North

America.

Leptocera

(=Limosina)

approximata,

new

species.

Male: Black-brown, subopaque. Second antennal _joint, viewed from above and the _side, velvety opaque black; cheeks and face yellowish- brown. Pleurae and _legs yellow-brown. Halteres _yellow, knob brown.

Wings ^clear.

Frons occupying almost the ^entirewidthofhead, fig. 2, center stripe shining, the narrowstripe on either side opaque orbits shining, ^lateral margins ^of center stripe with a row _{of hairs,} orbits covered with short