2 4 KANSAS UNIVERSITY QUARTERI.V. 



Tables of Species of Hygroceleuthus. 



MALES. 



Middle feet enlarged la/ifies, Lw. 



Tegular cilia black ciliaius, n. sp. 



Second abdominal segment with long yellow hair on the sides. . . 



afflict us, (). vS. 



Feet and abdomen plain, tegular cilia yellow crena/iis, O. S. 



FEMALES. 



1. First joint of antennae yellow, at most narrowly black along 



the upper edge latipes, Lw. 



First joint chiefly black 2 



2. Cilia of tegulae coarse, wholly black ciliafus, n. sp. 



Cilia mixed above and below with yellow 3 



3. Fourth vein with an unusually pronounced ^^wuq . .afflictiis, O. S. 

 Fourth vein with the ordinary flexure crenatus, O. S. 



HygTOseleuthus latipas Lomv. 



The figure in Loew's monograph (N. A. Diptera II. pi. iii, i) in- 

 correctly represents the middle tarsi of the male as being flattened, 

 instead of compressed; the first joint of the antenna, also, is more 

 hairy than shown, and the face of the female does not reach the in- 

 ferior corner of the eye. In the description (p. 18), line 10, "tibiae" 

 should read "femora." The first joint of the antenna is not at all 

 blackened in most of my specimens; the thickening of the costa is pe- 

 culiar to the males. 



Numerous specimens. Brookings, S. D. (common in September); 

 Wyoming; Connecticut. 



Hygroceleuthus crenatus (). S. 



Numerous specimens from California, and two from Washington. 

 Osten Sacken's material was not sufficient to enable him to discover 

 one very interesting fact concerning the tegular cilia of this species 

 and afflictiis. In the male they are light yellow, fine and delicate; in 

 the female they are of ordinary size and black, except a few of the 

 smaller ones above and below, which are yellow. 



A single male from \\"ashington differs from the rest in having the 

 antennae slightly longer, blacker, and more hairy; and the arista 

 shorter and more densely hairy (see figure). These differences in a 

 single specimen do not justifv the erection of a new species. 



Hygroceleuthus aflflictus O. S. 



One male and two females, California (Coquillett). The male is 

 easily distinguished by the bunch of yellow hair on each side of the 



