THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 65 



Coxae and femora black or metallic green, with their tips narrowly 

 yellow. Fore coxae with white pollen and minute black hairs on the 

 anterior surface; there are a few little white hairs on upper outer 

 corner. IVIiddle and hind femora each with one preapical bristle, 

 the latter with a row of little whitish hairs on lower inner edge, which 

 are about the same length as the black hairs along the upper edge 

 toward the base; they are so short that they could scarcely be called 

 cilia. Fore and middle tibiae yellow, the latter with one bristle 

 below, middle basitarsi without a bristle above. Posterior tibiae a 

 very little thickened apically; black with a reddish shade on basal 

 half of upper surface. Fore tarsi (fig. 2Q^a) one and one-fourth 

 times middle tarsi, about the length of their tibiae, black from the 

 tip of the first joint, which is yellow. Fore tarsi with the first joint 

 as long as the three following joints taken together, fifth shorter than 

 fourth. Hind tarsi wholly black. Calypters and halteres yellow, 

 the former with black cilia. 



Wings grayish; costa scarcely enlarged at tip of first vein; last 

 section of fourth vein bent beyond its basal tliird; third vein approach- 

 ing fourth a very little at their tips; hind margin of wing scarcely 

 indented at tip of fifth vein, evenly rounded, the anal angle being 

 nearly obsolete. 



Female. — Face wide, silvery white; fore tarsi as long, middle tarsi 

 a little longer than their tibiae, black from the tip of the first joint, 

 first joint yellow or brownish; hind tibiae yellow with their tips black 

 for one-third their length and with the black extending up the inner 

 surface as a line nearly to their base. Wing as in the male except 

 that the third vein is a little straighter and approaches the fourth a 

 little less at their tips, and the anal angle of wing is a little fuller. 



Described from 2 males and 1 female taken by E. J. Burnes on 

 Staten Island, New York; the female was taken Sept. 1. 



This bright little species resembles setifer Loew, but has larger and 

 darker lamellae, which are very much like those of albiciliatus Loew ; 

 it also differs from the former in not having a blackish spot at tip 

 of wing; from the latter it differs in having the hind tibiae almost 

 wholly black, and in the hind femora not having long black cilia, 

 but only little short pale hairs on the lower inner edge. 



Type.— Male, Cat. No. 22990, U.S.N.M. 



No. 27. DOLICHOPUS CONSPECTUS, new species. 



Male. — Length, 3.5-4 mm.; of wing, 3.5 mm. Face rather wide, 

 slightly narrowed below, silvery white. Front green with coppery 

 reflections, not very bright. Antennae black; first joint yellow 

 below, still in some individuals almost wholly black; third joint not 

 much longer than wide, somewhat orbicular in outline, but slightly 



