176 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



long as their tibiae, infuscated from the tip of the first joint, still the' 

 base of second yellowish. Hind tarsi deep black, about one and a 

 third times as long as their tibiae, Calypters and halteres yellow, 

 the f orm.er with black cilia. 



Wings (fig. 122) grayish; costa scarcely enlarged at tip of first vein ; 

 last section of fom-th vem bent at its second fifth; third vein bent 

 backward at tip, still nearly parallel with fourth at extreme tip; 

 hind margin of wing not indented at tip of fifth vein, slightly sinuated 

 from tip of fifth to anal angle, which is prominent; wing of somewhat 

 equal width. 



Redescribed from 6 males in the collection of J. M. Aldrich, 1 taken 

 at Keyport, Washington, August 7, 1905, the others at Seattle, Wash- 

 ington, and 2 males taken by A. L. Melander, in British Columbia, 

 1 at Abbotsford, August 9, and the other at Langley, iVugust 9. 



Type. — In American Museum of Natural History, New York, from 

 Vancouver Island. 



No. 123. DOLICHOPUS BLANDUS, new species. 



Male. — Length 4.5-5.8 mm. ; of wing 4-4.5 mm. Face moderately 

 wide, narrower below, pale golden yellow. Front shining green, 

 sometimes brassy green. First antennal joint wholly yellow or 

 with a very narrow black line on upper edge, rather short; second 

 and third joints black, taken together somewhat orbicular in out- 

 line, third rounded at tip; arista inserted near the base of the third 

 joint, about twice as long as the antennae. Lateral and inferior 

 orbital cilia pale yellow, about eight of the upper cilia black. 



Thorax green with brassy reflections, dulled with gray pollen 

 along the front edge of the dorsum; pleurae dulled with white pollen. 

 Abdomen green with coppery reflections and narrow black incisures ; 

 the white pollen on its sides extends upon the dorsum. Hypopygium 

 black; its lamellae (fig. 123a) large, twice as long as wide, somewhat 

 oval in outline but narrowing into the stem, whitish, with the apical 

 margin broadly, and the upper narrowly black, jagged and bristly 

 on lower apical corner, otherwise the apical and upper edges are 

 fringed with rather short brown hairs; lower edge with a few pale 

 hairs. 



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

 surface with little black hairs; middle and hind coxae black with 

 narrow yellow tips. Femora and tibiae yellow. Middle and hind 

 femora each with one preapical bristle, the latter without cilia below, 

 the little black hairs on the sides reaching the lower edge. Posterior 

 tibiae scarcely thickened, their apical half black, shading into the 

 yellow, sometimes the yellow extends farther toward the tip on the 

 lower edge; the glabrous stripe on upper edge distinct and reaching 

 from near the base to their tips. Fore tarsi (fig. 1236) one and a half 



