162 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



tarsi black from the tip of first joint, which is brownish; it has a 

 large bristle on upper surface beyond its middle. Hind tarsi missing 

 in the type, but no doubt they would be wholly black as in other 

 species with blackened tips to the tibiae. Calypters and halteres 

 yellow, the former with black cilia. 



Wings (fig. Ill) grayish, slightly tmged with brown in front of 

 second vein and narrowly along the fourth and cross vems; costa a 

 very little thickened from before the tip of the first vein, gradually 

 tapering to its tip; last section of fourth vein a little bent near its 

 basal third, being about as far from the cross-vein as the length of 

 that vein ; hind margin of wing a little indented at tip of fifth vein ; 

 wing narrowing from a little beyond the tip of fifth vein to the anal 

 angle, which is still rather prominent as the hind margm does not 

 round off to the root of the wing. 



Described from 1 male taken on rocks by the side of a stream on 

 the White Mountains, New Mexico, at Rio Ruidoso, at 6,500 feet 

 elevation (Townsend). 



Type.— Male, Cat. No. 23029, U.S.N.M. 



No. 112. DOLICHOPUS ABKASUS, new species. 



Male. — Length 4.5 mm. ; of wing the same. Face rather wide and 

 long, silvery white. Front shining green. Antennae yellow, third 

 joint with apical half brown, a little longer than wide, obtusely 

 pointed at tip. Palpi yellow. Lateral and inferior orbital cilia 

 white, about eight of the upper cilia on each side black. 



Thorax shining green with brassy reflections and yellowish gray 

 pollen on the dorsum, which does not dull it much, the bristles inserted 

 in little black dots; pleurae dulled with white pollen. Abdomen 

 green with conspicuous coppery reflections; the white pollen on its 

 sides abundant and extending upon the dorsum. Hypopygium 

 black; its lamellae (fig. 112) large, oval, nearly twice as long as wide, 

 whitish with a black border on apical and part of upper margin, 

 jagged and bristly at apex, fringed with delicate hairs above. 



All coxae yellow; fore coxae almost glabrous on the front surface, 

 still with a few very delicate yellow hairs. Femora and tibiae yellow. 

 Middle and hind femora each with one preapical bristle, the latter 

 glabrous below. Posterior tibiae but little thickened, blackened on 

 their apical half, the black shading into the yellow; the usual glabrous 

 stripe on upper surface appears as a yellowish stripe between the 

 rows of large bristles, it does not quite reach the base or tip. Fore 

 tarsi about one and a fourth times as long as their tibiae, somewhat 

 infuscatcd from their base, but only the fifth joint black; first joint 

 as long as the three following joints taken together, fourth about 

 two-thirds as long as third, fifth fully as long as fourth and a little 

 wider, being slightly enlarged. JVIiddle tarsi infuscated from their 



