ALDRU.'H: DOLICHOPUS AND HVGROCELEUTHUS. I9 



hairs on the front side. Middle and hind coxae bhick with yellow tip; 

 hind femora not ciliated, hind tibiae thickened in the middle, not glab- 

 rous. Fore tarsi over i V2 times the length of the tibiae; first two 

 joints yellow, slender; third joint slender, brown; fourth joint short, 

 black, enlarged, fringed above, obliquely truncate at tip; fifth joint 

 longer than fourth, black, fringed above, compressed; the empodiurn 

 forms a large, snow-white plume, lying just at the end of the fifth seg- 

 ment and apparently forming a part of it. Middle antl hind tarsi infus- 

 cated from the tip of the first joint. Wings hyaline, of uniform width, 

 cost with a short, rounded thickening at first vein. 



Length, 4.5 mm.; of wing the same. 



Two males, State of Washington (U. K.). 



Dolichopus occidentalis, n. sp. 



Male. Antennae black, first joint yellow: cilia of inferior orbit 

 yellow, of tegulae black; legs yellow, last joint of male fore tarsi 

 greatly enlarged. 



Face uniform pure yellow; front shining green; second segment of 

 antenna black, sometimes partly reddish on the inner side. Thorax 

 shining bluish-green, near the scutellum sometimes more blue; pleurae 

 green, scarcely dusted. Abdomen bright green, near the tip with 

 rather long black hairs on the posterior margins of the segments; 

 hypopygium shining black, at base with a greenish or coppery lustre, 

 the lamellae whitish, elongated, narrow, with broad black border at tip 

 and the usual bristles. Fore coxae red, with numerous rather coarse 

 hairs on the front side; middle and hind coxae black, tipped with 

 yellow. Femora and tibiae yellow, the hind ones plain. Fore tarsi 

 iji times the length of the tibiae; first two joints yellow, slender, 

 stalk-like, third half as long as second, brownish, a little thickened; 

 fourth exceedingly short, wider than long, black, with a few long hairs 

 above; fifth nearly as long as the preceding three, flattened, obovate, 

 with adense fringe of black hair above. Middle and hind tarsi 

 blackened from tip of first joint. Wings hyaline, costa thickened 

 somewhat before and far beyond the first vein, gradually tapering. 



Length, 5.5 mm.; of wing 4.5 mm. 



Two males, Washington (U. K. ). 



The females of occidentalis and pliiniosus will probably be readily 

 distinguished from each other by the color of the antennae. 



Dolichopus coquilletti, n. sp. 



Male. Antennae black, first joint chiefly red; cilia of inferior orbit 

 pale, of tegulae black; legs yellow, last j(jints of male fore tarsi en- 

 larged. 



