THE DIPTEKOUS GENUS DOLICHOPUS IN NORTH AMERICA. 171 



the posterior tibiae are infuscated at apex, their tarsi black; the middle and posterior 

 tibiae bear two rows of long, stout, black bristles behind, and a few similar bristles 

 are attached in front. On each of the middle and posterior femora a single bristle is 

 situated at some distance before the apex. Fore coxae clothed with fine black hairs 

 on the front surface in addition to the row of bristles. Palpi and halteres yellow. 

 Length 5.5 mm. ; wing 5 mm. 



I have not seen the species. 



Location of type not known. Hunter does not include it in his 

 list of types in the University of Kansas, 1913. 



No. 119. DOLICHOPUS PLUMIT ARSIS Fallen. 



Dolichopus plumitarsis Fallen, Dolichopodes, 1823, p. 10. — Zetterstedt, Dipt. 

 Scand., vol. 2, 1843, p. 556. — Schiner, Fauna Austr., vol. 1, p. 216.— Co- 

 QuiLLETT, Proc. Wash. Acad. Sci., vol. 2, 1900, p. 425. 



Male. — Length 5 mm.; of wing 5.5 mm. Face rather narrow, 

 silvery white. Front green with white pollen, antennae black; first 

 joint broadly yellow below; third joint one and a half times as long 

 as wide, obtusely pointed at tip. Lateral and inferior orbital cilia 

 white, about five of the upper cilia on each side black. Proboscis 

 and palpi yellow. 



Thorax green; dorsum with bronze reflections and a little gray 

 pollen on the front portion; pleurae dulled with white pollen. Ab- 

 domen green; the white pollen on its sides not very abundant. Hy- 

 popygium black; its lamellae of moderate size, oval, white with a 

 rather narrow black border, jagged and bristly on apical margin, 

 fringed above with little black hairs. 



Coxae, femora, and tibiae yellow. Middle and hind coxae largely 

 blackened on outer surface; fore coxae wholly yellow, their anterior 

 surface covered with minute yellow hairs. Middle and hind femora 

 each with one preapical bristle, the hind ciliated with 8 or 10 long 

 whitish hairs on the apical half of the lower inner edge, the longest 

 hairs being as long as the width of the femora. Middle tibiae with 

 three large bristles below, two near apical and one near basal third, 

 their basitarsi with one large bristle above near apical third, and 

 several small ones on the sides and lower surface. Posterior tibiae 

 thickened, black at tip for one-fifth their length; the usual glabrous 

 stripe on upper surface distinct, inner surface glabrous for their 

 whole length on upper part, broadly except toward the tip. Fore 

 tarsi (fig. 119) about one and three-fourths as long as their tibiae; 

 first three joints yellow, last two black; second joint two-thirds as 

 long as first, third three-fourths as long as second and a very little 

 widened at tip; fourth and fifth compressed and fringed above with 

 little black hairs, taken together about as long as second, fifth smaller 

 and shorter than fourth, oval, fourth somewhat triangular, widest 

 at tip. Middle tarsi one and one-fourth times as long as their tibiae, 

 blackened from the tip of the first joint. Hind tarsi wholly black. 



