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ENT OM OL OGICAL NEWS289

Undescribed.Speciesof the Genus Tanypremna
Osten Sacken (Dipt, : Tipulidae).
By Cuanr-os P. Ar-nx,rNocn,Amherst, trIassachusetts.
The genus Ton5,fremna is a very characteristic one in thehumid tropics of the New World. Tlie genns has been compact and well-delimitecl, but the accessionof tr,vo nerv species
has rendered it necessaryto divicle the genus into three sni-rgenera,two of which are describedat this time.
Genus Tanypremna ()sten Sacken.
1886. Tanyl:rennta Osten Sacken; Biol. Cent.-Americar.ra,Diot . . v ol. 1 :1 9 .
1S t + . T an y frc mn o Al e x a n d e r;J o u rn . N . Y . E nt. S oc.,22:206-215.
Subgenus Ceoneura subgen. n.
Charactersas in Tanyprcilln(t,s. s. ;vein,411deflectedcephalacl
and fused with vein 1i,*' for almost its entirt length, thefree portion of Mt representecl
only by a short, apparentcrossvein that closes a rectangular cell R5 that is about one-halflonger than cell rst X'[,.
Type of the subgenus.-7-an5,prcuun(Cconcuro) idioneura
sp. n. (Neotropical Region).
Tanypremna (Ceoneura) idioneura sp. n.
General coloration brown, variegated u'ith clarl<er; scutelium
broadly whitish rneclially;pleura yeliorvishwhite, narrorvly ancl
obliquely lined with clark bro.,vn; legs clark brorvn, tibia r,vitha broad, white, sub-terminal ring; tarsi rvhite except the basal
three-fifths to four-fifths of metatarsi; wirrgs subhyaline,thecostal-regionand rving-margin tinged with brorvn; veins M1and R**' fused, enclosinga rectanguiarcell R. aboveceil rsi M..
9. Leng th 1 8 .4 m m .;w i n g 1 0 .8 m rn .; abcl omenal one 15mm. Described from an alcoholic specimen.
Frontal prolongation of head very short, white; nasus very
stout; palpi brown, the secondand thircl segmentslargely white.
Antennae short, the scapal segmentspale, the flagellrrm brorvn.
Vertex pale anteriorly, passing into dark brown behind.
Mesonotal praescutumbrorvn medially, pale yellowish laterally; an indistinct median brorvn stripe that is crossecltransversely by a pale band before mid-length of the sclerite; acapillary brown line extending to the anterior margin of thesclerite; a brorn'n area at the humeral region ; scutellum andmedian area of postnotal mediotergite broadly whitish, margined
externally by dark brown, the lateral margins of the sclerite
paler brown; postnotal mediotergite dark brown, the lateral

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margins pale. Pleura yellowish white with a very narrow brownline running obliquely from the humeral region of the praescutum between the anepisternum and pteropleurite to above themid-coxae; sternopleurite tinged with brown. Halteres brown,
the base of the stem pale.
Legs with the coxae pale, the anterior face of the n-rid-coxa
suffused with brown; trochanters yellow; tib ae dark brownwith a conspicuouswhite ring (1.8 nm.) before the narrower(1 rnm.) brown tip; basi-tarsidark brown, the apical two-fifths(fore legs) to one-fifth (hind legs) pure white; rernainderof
tarsi pure white, only the terminal segment suffused with brownon its outer half ; claws simple.
Wings subhyaline, the apical margin very faintly infuscated;cell C hyaline basally, passing into brown distally; cell Sc andthe small stigma dark brown; veins dark brown. Venation: Sclong, Sc, extending to beyond mid-length of R,*,; cell znd R'very small; Rs short, straight, shorter than R,*'; tip of R, persistent; M, fused with R,*' at about two-fifths the length ofthe latter, ericlosing a rectangular or elongate cell R' above cell
rst M,; cell rsf M2 pentagonal,narrowed distally; fusion' of Cu'and M, short.
Abdominal tergites dark brown, indistinctly variegated withpaler; sternites obscure yellow; ovipositor ferruginous.
Hqb'itat.-British Guiana. Holotyfe; I , Kartabo, August 4,
l9l9 (A. E. Emerson). Type in the collection of Cornell University.
Tanyprewna id'ionewradiffers very notably from all the described speciesin its venation and leg-pattern. In the writer's
key to the speciesol Tanypremna (Journ. N. Y. Ent. Soc.,22:207-208; l9I4), the present species would run to the groupcontaining T. longipes (Fabricius) , T. longissirao (Enderlein)and I. mani,cataOsten Sacken, differing from all in its diagnostic characters.
Subgenus Tanypremnodes subgen. n.
Characters as in Tanypren'bna,s.s., differing chiefly in thestructure of the antennae. In the female, the basal four flagellar segmentsare weakly and irregularly pectinate,on the second
the base produced into a slender branch that is nearly as long as
the segment; the branch of the third segment is reduced to asmall basal serration; fourth segment with a conspicuousbasal
enlargement only; terminal flagellar segments elongate, withlong, conspicuous verticils that become longer distally. Tibial
spurs apparently lacking in the unique type. Wings with the
distal section of vein R, entirely atrophied.

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Typ" of the subgenus.- T anypremna
leuco,placasp. n. (Neotropical Region).

(Tany prernnodes)

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Tanypremna (Tanypremnodes) leucoplaca sp. n.
General coloration pale brown; head dark orange; femora
obscure yellow, the tips conspicuously blackened; tibiae black,the tips broadly white; tarsi black; wings strongly tinged withbrownish yellow, the costal region darker brown; veins Sc' andR' close together at wing-margin.
9 . Length 22 mm.; wing 13 mm.; abdo'menalone 18.5 mm.
Rostrurn very short, yellow, the elongate palpi pale brown.
Antenna with the scapal segments brownish yellow; flagellum
brown. Head dark orange, more saturated behind, somewhat
paler in the vicinity of the tubercle.
Mesonotal praescutumpale brown with three yellowish brown
stripes that are virtually confluent; remainder of meso'notum
yellowish brown, the scutellum darker. Pleura obscure brownish yellow. Halteres dark brown.
kgs with the coxae brownish yellow; trochanters obscureyellow, femora obscure yellow, the tips conspicuously blackened; tibiae black, the extreme base obscure brownish yellow,
the tips broadly white, occupying a little less than the apicalthird of the segment; tarsi black.
Wings with a strong brownish-yellow tinge, the costal region
darker brown; stigma very small and vaguely delimited, brown;
center of cells R and M with longitudinal pale centers; veins
black, those in the base and costal region brown. Venation: Sc'ending close to R' at wing-margin; Rs relatively short, about
two-thirds R,*', oblique; distal section of R, entirely atrophied ;cell M' large, its petiole shorter than m; cell rsf M,large, pent'agonal; basal deflection of Cw' longer than Cu, alone; cell znd Aof moderate width.
Abdomen dark trrown, the caudal margins of the segments
somewhat paler; sternites variegated with brown and obscureyellow.
Holoty'pe: I ; Upper Rocana, Northern
Habitat.-Brazil.
Para, June, 1918 (.t. M. Klages). Type in the collection of theCarnegie Museum, AccessionNo. 6175.
This interesting crane-fly was included in extensive series ofTipulidae sent to me for determination by Mr. Kahl, to whom
I am greatly indebted for numerous favors. The present species is readily told from all other known speciesof the genus
Tanyprernna by the broad white tibial tips and the absenceof
white on the tarsi.