AMERICAN DIPTERA. 375 



Habitat. — Atlantic States (Osten Sacken) ; White Mts., N. 

 H.; Mass.; Conn.; N. Y. (June 20); N. J. (Aug. 23); Pa. (July 

 20) ; Fla. ; Mo. (June 19) ; Ohio. 



This is a small species of rather variable size; the female is 

 often noticeably larger than the males. It is the only repre- 

 sentative of this genus now known from the United States. 



COPHURA. 



Cophura Osten Sacken, Biologia, Dipt., I, 181, 1887. 

 |[ Blax Loew, Centur, X, 24, 1872. 

 [| Blacodes Loew, Berl. Ent. Zeit., 1S74, 377. 

 || Loewiella Williston, Manual N. A. Dipt., p. 57, 1896. 

 Cophura Williston, Biologia, Dipt., I, 314, 1901, note and listof 

 species. 



"Head as in Nicocles, disciform, with prominent eyes; face 

 very slightly convex, almost flat; mystax composed of a row 

 of a few bristles placed at a short distance above the oral edge, 

 and a second, still smaller, row upon the edge itself; the rest 

 of the face microscopically pubescent ; ocellar tubercle salient, 

 and with four moderately long bristles, the front pair the 

 shortest; occipital bristles rather weak. Antennae: first seg- 

 ment subcylindrical, the second subconical and nearly of the 

 same length, the third segment about the length of the first 

 two taken together, or a little longer, sublinear or elongate- 

 elliptical, with a short subfusiform style ending in a short, 

 bristle-like point. Thorax gibbous, like that of Nicocles; the 

 usual bristles present — -three praesutural, and a number of weak 

 prasscutellar, but none on the scutellum (in Nicocles there are 

 two). Abdomen rather flat, smooth, without punctures; end- 

 ing in the male in a protruding forceps, and in the female in 

 the ovipositor, bearing a coronet of spinules. Legs as in 

 Nicocles, of moderate length and strength, with rather weak 

 femora and straight tibiae. Wing shorter and broader than in 

 Nicocles; first and fourth posterior cells broadly open, anal 

 cell closed near the margin." 



" This new genus belongs to the group of Dasypogoninas with 

 a hook at the end of the front tibiae, and is allied to Nicocles, 

 which it resembles in the coloration of the thorax and the 

 legs. The abdomen, however, is flatter, and not expanded in 



TRANS. AM. ENT. SOC, XXXV. SEPTEMBER, 1909 



