ZooL.— Vol. II.] WHEELER— DOLICHOPODID^. 5 1 



50. Sympycnus pugil, sp. no v. 



Plate IV, Figs, ioi and 102. 



Male. Length 2.5 mm.; length of wing 2.5 mm. Face covered with 

 gray dust. Antennae black; third joint small, with a blunt point, pilose, 

 arista slender, tapering, with short pubescence. Front dull metallic green. 

 Postocular cilia black above, white below. Thorax, scutellum and abdomen 

 dull metallic green, the first with a thin layer of white dust. Abdomen later- 

 ally compressed, venter somewhat yellowish. Hypopygium large, rounded; 

 appendages exserted, dull dark green, overlaid with gray dust. Coxae and 

 legs yellow; middle and hind coxas and upper surfaces of hind femora infus- 

 cated; fore and hind tarsi blackened from the tip of the first joint; first joint 

 of fore tarsi nearly as long as all the remaining joints taken together; second, 

 third and fourth joints short, thickened and of about equal length; fifth joint 

 distinctly broader and longer than the preceding joint, indented at the tip 

 and furnished with several black bristles and much enlarged pulvilli; claws 

 appear to be absent. Middle tarsi with the fourth and fifth joints entirely 

 black, but only the extreme tips of the first, second and third joints black; 

 first joint slender, as long as the second and third taken together, these ot 

 about equal length and each a little shorter than the fourth and fifth joints 

 taken together; fourth and fifth joints of equal length, distinctly dilated and 

 fringed with black bristles. Hind tarsi shorter than the hind tibiae, first, 

 second and third joints distinctly thicker than the fourth and fifth; first and 

 second joints subequal, the second bearing a few long bristles on its upper 

 side near the tip; third joint a little longer than the fourth. Wings gray, 

 narrowed towards the base; fourth vein terminating exactly in the tip of the 

 wing; distal segment of fifth vein scarcely longer than the posterior cross- 

 vein; sixth vein apparently absent. Halteres and tegulae yellow, the latter 

 with long yellowish cilia. 



One specimen from Seattle, Washington, received from 

 Professor J. M. Aldrich. 



This species differs from all the other North American 

 Sympycnus in having all the feet ornamented. 



Nothosympycnus, no v. gen. 



This genus, which was defined in connection with Sym- 

 pycnus, from which it was separated, appears to have affin- 

 ities with Parasyntormon and through this genus with Syn- 

 tornion. From Parasyntortnon it differs in the structure of 

 the fore tarsi of the male, and in not having the overlap- 

 ping lobe of the second antennal joint. Of the six species 

 included in the following table, three occur in the Eastern 

 and Middle, and three in the Western States. The table 

 includes only the males. 



