THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 185 



costa scarcely enlarged at tip of first vein; hind margin of wing 

 nearly straight; anal angle prominent. 



Redescribed from many males and females from the following 

 localities: Europe; Yakutat, Alaska, June 21 (Kincaid); Moscow, 

 Idaho, June 14 (Aldrich) ; Sheridan, Wyoming, July (Metz) ; Monterey, 

 California, July 13 (Wheeler); Washington several places, May 29- 

 July 24; Yellowstone Park, North West Entrance, August 4; Colorado; 

 Wells, Nevada, June 6; Erwin, South Dakota, June; Eastport, 

 Maine, June 29. 



Loew reports it from Quebec, Canada; Aldrich, South Dakota and 

 Colorado; Melander and Brues from Colorado and Vancouver Island; 

 Skinner from Beulah, New Mexico; Coquiilett from Alaska, several 

 places. 



Location of type unknown; described from Europe. 



No. 129. DOLICHOPUS DASYPODUS Coquiilett. 



Dolichopus dasypodus Coquiilett, Canadian Entomologist, vol. 42, p. 42. 



Male. — ^Length, 4 mm.; of wing, the same. Front moderately 

 wide, pale yellowish. Front green, somewhat dulled with gray pollen ; 

 first antennal joint wholly yellow or with the upper edge very nar- 

 rowly black; second and third joints black, taken together somewhat 

 oval in outline, a little longer than wide; third obtusely pointed at 

 tip. Lateral and inferior orbital cilia pale yellow, more white below, 

 the black cilia descending about one-fourth the eye height. 



Thorax green with bronze reflections, forming the beginnings of two 

 narrow vittae on the front of the dorsum, which is dulled with white 

 pollen, especially in front; pleurae dulled with white pollen. Abdo- 

 men green with slight bronze reflections and narrow black incisures ; 

 the white pollen on its sides conspicuous. Hypopygium black; its 

 lamellae of moderate size, somewhat quadrangular in outline, whitish 

 or yellowish with rather wide black border on apical and upper 

 margins; jagged and bristly at apex, fringed above with stiff black 

 hairs. 



Fore coxae wholly yellow with silvery pollen and minute pale hairs 

 on anterior surface. Middle and hind coxae black with yellow tips. 

 Femora and tibiae yellow; middle and hind femora each with one 

 preapical bristle, the latter nearly bare below. Middle tibiae slightly 

 enlarged at tip and with a somewhat opalescent, elongated spot at tip 

 on upper surface; posterior pair with a brown or blackish spot on 

 outer and inner side at tip; the glabrous stripe on upper surface 

 conspicuous and extending their whole length. Fore tarsi one and a 

 fourth times as long as their tibiae, black from the extreme tip of the 

 first joint, their joints of regularly decreasing length. Middle tarsi 

 only a little longer than their tibiae, wholly deep black, their basitarsi 

 thickened about as those of the hind tarsi and with several bristles, 



