236 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



rv;>^^— Male, Cat! No. 23050, U.S.N.M., from Franconia, New 

 Hampshire. 



The fo.ni of the wing in this species is very much like that of 

 harhechl but the anal angle has not the lobe extending toward the 

 root of the wing as in that species, nor does it have the sinus at tip of 

 fifth vein; it also lacks the black spot at tip of wing. The pollen on 

 the dorsum of the thorax is about the same in both species, the feet 

 differ a little. 



No. 172. DOLICHOPUS VIRGINIENSIS, new species. 



Male. — Length 4.7 mm.; of wing 4.5 mm. Face moderately wide, 

 golden yellow, paler below. Front green, dulled with gray pollen. 

 Antennae black; first joint yellow below; third joint about as long 

 as wide, somewhat conical in outline, obtusely pointed at tip. Lat- 

 eral and inferior orbital cilia whitish, about five of the upper cilia 

 black. 



Thorax green with bronze reflections, which sometimes form a 

 median vitta on the dorsum, which has gray pollen that is most con- 

 spicuous in front; pleurae dulled with whitish pollen. Abdomen 

 green with reddish coppery reflections; the white pollen on its sides 

 abundant. Hypopygium biack; its lamellae of moderate size, some- 

 what triangular, a little rounded at apex, whitish with rather narrow 

 black apical border, jagged and bristly at lower corner, otherwise 

 the apical margin is fringed with black hairs. 



Fore coxae yellow, with minute yellow hairs on the anterior sur- 

 face. Middle and hind coxae black with yellow tips. Femora and 

 tibiae yellow, middle and hind femora each with one preapical bristle, 

 the latter M'ithout cilia below, nearly bare on lower half, wliere there 

 are only some very delicate yellow hairs. Posterior tibiae a very 

 little thickened, especially near the base, where there is a little hol- 

 low on inner suiface, which is glabrous for the entire width at this 

 point, the glabrous part tspering toward the tip of the tibiae and 

 ending a little be^'ond its middle. Fore and middle tarsi one and 

 one-fourth times as long as their tibiae; fore tarsi wholly yeUow, the 

 flftli joint being the palest and about as long as the fourth, first joint 

 as long as the three following taken together, middle tarsi yellow, a 

 very little darker from the tip of the first joint. Hind tarsi black 

 from the tip of the first joint. Calypters and halteres yellow, the 

 former wdth black cilia. 



Wings (fig. 172) rather evenly tinged with brown, but not dark; 

 costa scarcely enlarged at tip of first vein; last section of fourth 

 vein a little bent beyond its basal tliird; rather widely separated 

 from and nearly parallel with third vein; hind margin of W'ing not 

 indented at tip of fifth vein; between the tips of fifth and sixth 

 veins there is a shallow sinus and another between tip of sixth vein 



