74 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



Described from 7 males and 4 females. Prof. J. M. Aldrich took 

 2 males and 2 females at Wells, Nevada, July 12, 1911; I took 4 

 males and 2 females at the same place June 6, 1915, and 1 male at 

 Saltair, on Great Salt Lake, Utah, June 8, 1915. 



Type.—U&le, Cat. No. 22993, U.S.N.M., from Wells, Nevada. 



No. 34. DOLICHOPUS FUMOSUS, new species. 



Male. — Length 3.5 mm.; of wing 3 mm. Face rather wide, 

 yellowish. Front green. Antennae (fig. 34«) black, first joint 

 slightly yellowish below; first and second joint short; third joint 

 about three times as long as wide with an acute point at tip, its 

 pubescence conspicuous; arista but little longer than the third joint 

 and inserted just above its tip, inferior orbital cilia whitish, about 

 six of the upper cilia on each side black. 



Thorax greenish brown, dulled with brownish gray pollen, which 

 leaves when viewed in certain directions three shining vittae; pleurae 

 with grayish pollen. Abdomen bronze brown with green reflections 

 and with large spots of white pollen on the sides of the segments. 

 Hypopygium black; its lamellae small, oval, narrowed into the 

 stem, whitish with a black border, jagged and bristly at apex and 

 with delicate hairs on upper edge. 



Coxae black, their extreme tips and the trochanters yellow. Fore 

 and middle femora black with broad yellow tips. Middle and hind 

 femora with one preapical bristle, the latter black and apparently 

 without cilia below. Fore and middle tibiae yellow; hind tibiae 

 brownish yellow, becoming black at tip, but little thicker than the 

 others, the glabrous stripe on upper surface extending nearly their 

 entire length; fore and middle tarsi about equal to their tibiae in 

 length, yellow, infuscated from the tip of first joint, still each joint 

 paler at base. Hind tarsi wholly black. Calypters and halteres 

 yellow, the former with black cilia. 



Wings (fig. 34) grayish; costa enlarged at tip of first vein, gradually 

 tapering to its tip ; last section of fourth vein a little bent at its basal 

 third; third and fourth veins nearly parallel beyond this bend; 

 hind .margin of wing scarcely indented at tip of fifth vein, evenly 

 rounded; anal angle broadly rounded. 



Described from 1 male taken at Farwell Creek, South Saskatche- 

 wan, Canada, in July, 1907, by Dr. E. M. Walker. 



Type.~M.Si\e, Cat. No. 22994, U.S.N.M. 



This species has remarkable antennae; the acute point, conspic- 

 uous pubescence, and nearly apical arista, are rarely found in this 

 genus. 



