THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 291 

 No. 214. DOLICHOPUS SAROTES Loew. 



Dolichopus sarotes Loew, Cent., vol. 7, 18GG, No. 81.— Melander and Brues, 

 Biol. Bull., vol. 1, 1900, p. 148.— Aldrich, Cat. N. Amer. Dipt., 1905, p. 304, 

 note. 



Male. — Length 5-5.5 mm.; of wing 5-5.7 mm. Face wide, only a 

 little narrowed below, silvery white. Front green, sometimes with 

 blue or violet reflections. Antennae yellow; third joint about as long 

 as wide, obtusely pointed at tip, sometimes infuscated on apical half. 

 Lateral and inferior orbital cilia yellowish, about eight of the u])per 

 cilia on each side black. 



Thorax green, usually with bronze reflections; dorsum usually with 

 three coppery vittae, the median one narrow and sharply defined, 

 dulled with a little grayish pollen, especially along the front; pleurae 

 dulled with white pollen. Abdomen green with coppery reflections; 

 the white pollen on its sides abundant and extending upon the dor- 

 sum. Hypopygium black with metallic reflections on basal portion ; 

 its lamellae of moderate size, somewhat eUiptical, nearly twice as 

 long as wide, yellowish or whitish with a black border, which is wide 

 on apical, narrow on upper margin, jagged and bristly at apex, 

 fringed on upper edge with rather long black hairs, below with a few 

 small pale hairs. 



Coxae, femora and tibiae yellow. Middle coxae blackened on 

 outer side ; fore coxae with white pollen and little pale hairs on their 

 anterior surface, mixed with the pale hairs on apical third are a few 

 minute black ones, which also cover the inner edge to their base. 

 Middle and hind femora each with one preapical bristle, the latter 

 nearly bare below, still with a row of little yeUow hairs on lower inner 

 edge. Middle tibiae with three bristles below, two at apical and one at 

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

 third. Posterior tibiae a little thickened, the usual glabrous stripe on 

 upper surface distinct but broken; inner surface v/ith a glabrous spot 

 near basal third, where the tibiae are slightly more thickened, from the 

 spot extending to the tip is a glabrous line, formed by the omission 

 of a single row of little hairs. Fore tarsi (fig. 214) one and a fourth 

 times as long as their tibiae, yellow, black from the middle of the 

 third joint; second joint scarcely two thirds as long as first, last three 

 joints taken together scarcely as long as the second, black; third and 

 fourth fringed above with long black hairs, slightly compressed, fourth 

 about as wide as long, fifth joint nearly orbicular, fringed above with 

 little black hairs. Middle and hind tarsi black from the tip of the 

 first joint, the former a little longer than their tibiae. Calypters 

 and halteres yellow, the former with black cilia. 



Wings (figs. 214a) grayish; inner edge- of costa yellowish; costa 

 witli a slight elongated enlargement at tip of first vein; last section of 

 fourth vein bent just beyond its basal third, sometimes the posterior 



