THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 227 



somewhat parallel and rising rather abruptly from the stem at base, 

 nearly one and a half times as long as wide, white with a rather 

 narrow black border on apical margin, which is jagged and bristly. 

 Fore coxae yellow with a greenish stripe on the outer posterior edge, 

 their anterior surface covered with silvery pollen and very minute 

 white hairs, with some black ones along inner side; there are also 

 some black bristly hairs at base. Middle and hind coxae black with 

 yellow tips. Femora and tibiae yellow. Middle femora with one 

 preapical bristle; hind pair with a row of bristles of increasing length, 

 ending in the usual preapical bristles. Posterior tibiae thickened 

 and compressed, their inner surface with a glabrous groove, this 

 groove is not exactly glabrous but is covered with very minute 

 hairs; the lower posterior bristle at tip of middle tibiae is long and 

 very slender and of a pale yellow color. Fore and middle tarsi 

 about as long as their tibiae, black from the tip of the first joint; 

 anterior pair with the fii'st joint nearly as long as the remaining four 

 taken together, third and fifth of equal length, fourth a little shorter. 

 Hind tarsi black from the middle of the first joint, a little longer than 

 their tibiae. Calypters and halteres yellow, the former with black 

 cilia. 



Wings (fig. 164) grayish, slightly tinged with brown along the 

 front and on the cross-vein; costa black and rather thick from the 

 tip of the first vein, where there is a rather long knot-like enlarge- 

 ment; last section of fourth vein bent a little before its middle; hind 

 margin of wing indented at tip of fifth vein, rather evenly rounded; 

 anal angle rounded, but rather prominent. 



Described from 4 males. Two were taken at Hood River, Oregon 

 (Cole); 1 at Corvallis, Oregon; 1 at Sobre Vista, Sonoma County, 

 California, June 29, 1910. 



Type.—Ueile, Cat. No. 23047. U.S.N.M. 



No. 165. DOLICHOPUS PENICILLATUS, new name. 



Hygroceleuthus dliatus Aldrich, Kansas Univ. Quart., vol. 2, 1893, p. 25, pi. 1, 

 fig. 28 (preoccupied).— Wheeler, Proc. Calif. Acad. Sci., vol. 2, 1899, p. 

 3.— Melander and Brues, Biol. Bull., vol. 1, 1900, p. 133, figs. 



Male. — Length, 4-5.5 mm.; of wing, 4.5-4.75 mm. Face rather 

 wide and long, silvery below, strongly tinged with yellow above. 

 Front shining green, with a trace of yellowish pollen on its sides. 

 Antennae black; first joint yellow below, as long or longer than third 

 joint; second joint with a yellow spot at base; third joint a little 

 longer than wide, obtusely pointed at tip. Upper third of the orbital 

 cilia black, lower two-thirds pale yellow. 



Thorax green with bronze reflections, somewhat dulled with yel- 

 lowish 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 with green 



