THe CRANE-FiIES oF New York — Part I ~ 901 
A conspicuous feature occurring in the flies of this genus is the presence 
of a fold in the first anal cell of the wing, which is most evident if the 
wing is held against the light. 
Genus Teucholabis Osten Sacken 
1859 Teucholabis O.S. Proc. Acad. Nat. Sci. Phila., p. 222. 
There are about forty-five described species in the genus Teucholabis, 
two-thirds of which are from tropical America, the center of distribution 
for the group. The larvae of 7. complexa are found underneath decaying 
bark, a habitat very like that of the related genus Elephantomyia. 
The local species of Teucholabis may be separated according to the 
following key: 
Wing over 6 mm.; wings broad; Sc long, ending beyond two-thirds the length of the sector; 
r inserted on R2+s; vein R2+3s not upturned at its tip, the end of cell 2d Ri being much 
broader than the end of pe Rs; prescutum reddish with three black stripes. [Proc. 
Acad. Nat. Sci. Phila., p. 223, pl. 3, fig. 10. 1859.] (Plate XX XIII, 52.) T. complexa O. S. 
Smaller, wing under 5 mm.; wings narrow; Sc short, ending before midlength of the sector; 
r inserted at or near the end of Rs; vein Rots upturned at the tip, the end of cell R; 
being broader than the end of cell 2d Ri; prescutum shiny black, only the humeral parts 
of the sclerite light yellow. [Can. Ent., vol. 48, p. 48. 1916. Proc. Acad. Nat. Sci. 
Phila., p. 498, pl. 25, fig. 16.. 1916.] (Plate XX XIII, 58.)............. T. lucida Alex. 
The vigorous, broad-winged TJ. complexa is the northernmost local 
species. 
Tribe Eriopterini 
The genera of the tribe Eriopterini may be separated in accordance 
with the following key: 
1. Wings very much reduced, microscopic, very much smaller than the halteres. 
Chionea Dalman (p. ou) 
Wings normally developed, much longer than the halteres.......................... 
2. Three branches of the media reaching the WANS Mane hoy eee Cladura O. 8. (p. 7) 
Two branches of the media reaching the wing margin.....................-.020-0-08 
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Doo, N@PAVEENP HE i io Da a ee, AS A te eres apa oat etl China ere Dh NOUS atria inated opi a 
Maca MCEOSS= Viel ESCM tis ci ye ee Aiea cy ei th ayie ee Sotrae Ua ayia ain ang th Rt UAC balan SR ce 5 
RNCTAICROSS Velie ac kam Ook Walon ibe cummins s., US cata Mantas etree ate Mii iU para canal apse gents Awatannye Dain ane 6 
5. Rs elongate, longer than Rs+;s alone; tuberculate pits on the anterior part of the 
[OPER OUTUAUIODNS if ens Ms ae te Nee ney ue Rhabdomastix caudata (Lundb.) (p. 904) 
Rs shorter, not so long as R:+;; tuberculate pits retreated back on the prescutum. 
Erioptera, subgenus Empeda (p. 908) 
6. Sc very long, extending to the end of the sector; basal deflection of Cu: at the fork of 
NYT OP lS LOAVG LN his ee ae ene © MONRO en Nee niece Rhabdomastix Skuse (p. 904) 
Sc short, not extending beyond midlength of the sector; if Sc projects beyond the base 
of the sector, the basal deflection of Cu: is far before the fork of M. 
Gonomyia Meig. (p. 904) 
