126 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



Sept. 5, 1909, by H. S. Harbeck; 1 male taken at Eastport, Maine, 

 June 30; 6 males and 3 females from Woods Hole, Massachusetts; 

 and 2 males and 2 females from New Bedford, Massachusetts, May 

 20, 1896 (Hough). 



Type.—MalG, Cat. No. 12765, U.S.N.M. 



No. 81. DOLICHOPUS BARYCNEMUS Coquillett. 



Dolichopus barycnemus Coquillett, Harriman Alaska Exped., Insects, vol. 9, 

 p. 28, 1904; Proc. Wash. Acad. Sci., vol. 20, 1904, p. 423. 



Male. — Length 5.2 mm.; of wing 5 mm. Face wide for a male, 

 yellowish white, purer white below. Front green, not very shining. 

 Antennae black; first joint yellowish on lower edge; third joint only 

 a little longer than wide, oval, rather rounded at tip. Lower orbital 

 cilia yellowish; the black cilia descend nearly to the middle of the 

 eye height. 



Thorax green with very slight bronze reflections and abundant 

 gray pollen on the anterior portions of the dorsum; pleurae dulled 

 with gray pollen, more blackish than the dorsum. Abdomen green 

 with very slight bronze reflections and narrow black incisures; the 

 white pollen on its sides abundant. Hypopygium black; its lamellae 

 moderately large, somewhat oval in outline, whitish with a narrow 

 black border above and wider black border at apex, jagged and 

 bristly on apical margin, fringed with black hairs above. 



Fore coxae yellow with a small black spot at base on outer side, 

 their anterior surface clothed with minute hairs, which are yellow 

 on outer half and black on inner portion; middle and hind coxae 

 black with yellow tips. Femora yellow; middle and hind femora 

 each with one preapical bristle, the latter black at tip and ciliated 

 below on their apical half, with scattering black hairs, the longest 

 of which are nearly as long as the width of the femora, those near 

 the tip very short; these hairs have a brownish or yellowish color 

 in certain lights, and there are a few very delicate white hairs on the 

 lower edge near the base. Fore and middle tibiae yellow, slightly 

 darker toward their tips. Posterior tibiae black with the knees 

 yellow, thickened, the glabrous stripe on upper surface between 

 the rows of large bristles distinct. Fore tarsi one and a fourth 

 times as long as their tibiae; first three joints yellowish with brown 

 tips, first ab.out one and a half times as long as second; fourth joint 

 a little longer than the fifth, black, slightly compressed, fifth a little 

 more compressed, oval, about twice as long as wide, still not con- 

 spicuously enlarged, black; pulvilli white. Middle tarsi a little 

 longer than their tibiae, black from the tip of the first joint. Hind 

 tarsi wholly black. Calypters and halteres yellow, the former with 

 strong black cilia. 



