THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 187 



yellow. Femora and tibiae yellow. Middle and hind femora each 

 with one preapical bristle. Posterior tibiae a little blackened at tip, 

 middle tibiae also a little darkened at extreme tips, with one long 

 bristle below. Fore tarsi one and a fourth times as long as their 

 tibiae, black or brownish from their base, first joint as long as the 

 three following taken together, fifth longer than the fourth; middle 

 tarsi a little longer than their tibiae, wholly deep black, first joint 

 but little thickened, without a bristle above, about as long as the two 

 following joints taken together. Hind tarsi wholly black. Calypters 

 and halteres yellow, the former with black cilia. 



Wings (fig. 217) grayish, a little clouded along the cross-vein and 

 the last section of fourth vein; last section of fourth vein bent before 

 its middle; anal angle prominent. 



Described from 3 females: 1 taken at Fort Wrangle, Alaska, by 

 Wickham; 1 taken at Helena, Montana, August 9, 1901, by A. L. 

 Melander; and 1 at Huntington Lake, Fresno County, California, 

 July 27, 1919, at 7,000 feet elevation, by E. P. Van Duzee, and in 

 the California Academy of Sciences. 



Type.— Male, Cat. No. 23033, U.S.N.M., from Fort Wrangle, Alaska. 



No. 131. DOLICHOPUS FULVIPES Loew. 



Dolichopus fulvipes Loew, Cent., vol. 2, 1861, No. 61; Mon. N. Amer. Dipt., 

 pt. 2, 1864, p. 61. 



Male. — ^Length 4.75-5.74 nrni.; of wing the same. Face moderately 

 wide, long, reaching nearly to the lower corner of the eyes, rounded 

 below, golden yellow. Front dark shining green, often blue, almost 

 violet. First antennal joint (fig. 131a) yellow, rather long, the hairs 

 on upper surface numerous and stiff; second joint yellow; third joint 

 yellow with apical half blackish, twice as long as wide, somewhat 

 elliptical, obtusely pointed at tip, arista inserted at the middle of 

 the upper edge, as long as the antennae. Lateral and inferior 

 orbital cilia yellow, about six of the upper cilia on each side black. 

 Proboscis blackish; palpi yellow. 



Thorax green with bronze and blue reflections, usually with a 

 narrow bronze line on each side of the acrostichal bristles; dorsum a 

 little dulled with gray pollen; pleurae dulled with white pollen. 

 Abdomen green with bronze reflections; the white pollen on its sides 

 abundant and extending upon the dorsum. Hypopygium black, 

 its lamellae rather small, somewhat oval in outline, about one and a 

 half times as long as wide, whitish with a very narrow black border 

 on the apical margin, which is jagged and bristly, fringed above with 

 delicate brown hairs. 



Fore coxae yellow, their anterior surface with black hairs, there are a 

 few minute yellow ones on outer edge of front side. Middle and hind 

 coxae black with yellow tips. Femora and tibiae yellow. Middle 



