THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 279 



Costa distinctly thickened at tip of first vein, fourth not sharply angulate. Incision 

 at tip of fifth vein well marked. 



Austin, Texas, May, 1900. 



This species is readily recognized by the peculiar ornamentation of the male fore 

 tarsi and the configuration of fore [hind] tibiae. The fore tarsi approach most closely 

 to D. sexarticulaius Loew, from which they differ by their very small appendages. It 

 is a peculiar form. 



I have not seen the species ; the drawing was made by Mr. Cole from 

 the type specimen in the collection of A. L. Melander. 



No. 205. DOLICHOPUS TERMINALIS Loew. 



Dolichopus terminalis Loew, Cent., vol. 5, 1864, No. 78. — Melander and Beues, 



Biol. Bull., vol. 1, 1900, p. 148. 

 Dolichopus germanus Wheeler, Psyche, vol. 5, 1900, p. 341. 



Male. — Length 4-4,5 mm.; of wing 3.2-4 mm. Face narrow, a 

 little wider above, silvery white. Front shining green with more or 

 less blue reflections. Antennae yellow; third joint infuscated toward 

 its tip, about as long as wide, obtusely pointed at tip. Lateral and 

 inferior orbital cilia white, about six of the upper cilia on each side 

 black. 



Thorax green; dorsum sometimes with coppery reflections, which 

 form a median vitta, and with a little gray pollen which is mostly 

 found along the front edge; pleurae dulled with white pollen. Ab- 

 domen green with coppery reflections; the white pollen on its sides 

 quite abundant. Hypopygium black, its basal portion with green 

 reflections and white pollen; its lamellae rather large, somewhat oval, 

 nearly twice as long as wide, white with a rather narrow black border 

 on apical and upper margins, jagged and bristly at apex, which is 

 somewhat pointed, fringed above with delicate black hairs. 



Coxae wholly yellow; fore coxae with white pollen and numerous 

 delicate white hairs on their anterior surface; middle coxae with an 

 unusually long bristle on outer surface, it being one-third longer than 

 that on hind coxae femora and tibiae yellow. Middle and hind femora 

 each with one preapical bristle, the latter nearly bare below, still with 

 a few minute yellow hairs near lower edge. Middle tibiae with three 

 bristles below, two near apical third and one just before the middle, 

 their basitarsi with a bristle, which is not very large, on upper surface 

 near apical third. Posterior tibiae not thickened; the usual glabrous 

 stripe on upper surface not very distinct. Fore tarsi (fig. 205a) 

 one and a half times as long as their tibiae, yellow with the last joint 

 black, contrasting strongly with the pale joints preceding it and a 

 very little compressed, scarcely as long as fourth, somewhat oval; 

 first joint about as long as the three following joints taken together, 

 second two-thirds as long as first, third only a little shorter than second 

 and fully as long as fourth and fifth taken together. Middle tarsi 

 one and one-fourth times as long as their tibiae, black from the tip of 



