THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 209 



middle; third vein only slightly bent backward at tip; hind margin 

 of wing slightly indented at tip of fifth vein; anal angle prominent. 

 Described from 1 male taken on the top of the Las Vegas Range, 

 New Mexico, June 28, 1902 (Cockerell) ; and one male taken at Geneva 

 Park, Grant, Colorado, July 21, 1916 (E. C. Jackson), at an eleva- 

 tion of 10,000 feet. 



Type.— Male, Cat. No. 23040, U.S.N.M., from New Mexico. • 

 This is much like walkeri, but the joints of the fore tarsi are of 

 different lengths, the wings have a small enlargement at tip of first 

 vein and their hmd margin is straighter, the first antennal joint is not 

 distmctly black above, the fore coxae have a large blackish spot, 

 at base on outer side, and the hind tibiae are more blackened at tip. 



No. 150. DOLICHOPUS PROCERUS, new species. 



Male. — -Length 4.5-5 mm.; of wing the same. Face rather wide, 

 a little narrowed below, yellowish gray. Front green with coppery 

 reflections, sometimes blue-green, rather shinmg. First antennal 

 joint yellow, sometimes narrowly black on upper edge; second and 

 third jomts black, third one and a half times as long as wide, some- 

 what oval, usually a little jjointed at tip. Lateral and inferior 

 orbital cilia yellowish, about six of the upper cilia on each side black. 



Thorax shining green, usually with a median coppery vitta on the 

 dorsum, sometimes with blue reflections; pleurae dulled with white 

 pollen. Abdomen green with bronze, coppery, or blue reflections; 

 the white pollen on its sides abundant and extending upon the 

 dorsum. Hypopygium black; its lamellae large, somewhat oval in 

 outline, nearly twice as long as wide, whitish with a black border 

 which is wide on apical, narrow on upper margin, a little jagged and 

 bristly on lower apical comer, fringed above with little black hairs. 



Fore coxae yellow with the extreme base a little blackened, their 

 anterior surface with little black hairs. Middle and hind coxae 

 black with yellow tips. Femora and tibiae yellow. Middle and hmd 

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

 the hairs on their sides wholly black. Posterior tibiae slightly 

 thickened, brownish toward the tip on mner side, hairs on inner 

 surface longer and denser on apical half. Fore tarsi (fig. 150a) 

 nearly one and three-fourths times as long as their tibiae; first 

 three jomts yellow, slender, first two of about equal length, third 

 fully half as long as second, fourth a little compressed, black, 

 about as wide as long, one-third as long as third; fifth joint black, 

 compressed, somewhat romid m outline, only a little longer than 

 wide, as long as third jomt, fringed above with little hau*s; pulvilli 

 white, conspicuous. Middle tarsi one and a fourth times as long as 

 their tibiae, black from the tip of the first joint, which has a large 



