THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 253 



long as second; fourth and fifth joint compressed and widened; 

 fourth white, fifth black, distinctly shorter than fourth, oval, both 

 with little black hairs on upper edge. Middle tarsi about one and a 

 foui'th times as long as theh tibiae, infuscated from the tip of the first 

 jomt, still the bases of the joints are more or less yellow, their tips 

 black or bro^\ai; middle basitarsi with a large bristle above. Hind 

 tarsi black from the tip of the first joint. Calypters, their cilia, and 

 the halteres yellow. 



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

 margin of wing flattened a little from the apex of the wing to tip of 

 fifth vein, where it is a little indented; last section of fourth vein 

 bent near its basal third; anal angle rather prominent, but rounded. 



Female.— Face wide, covered with whitish pollen; fore tarsi plain, 

 about one and a fourth times as long as their tibiae, colored about 

 like the middle ones in the male, fifth joint nearly as long as the third, 

 fom'th a very little shorter; hind femora without cilia; wings more 

 evenly rounded on the hind margin, without costal enlargement. 



Redescribed from many males. The collection of J. M. Aldrich 

 has specimens taken at Battle Creek, Michigan; Ithaca, New York, 

 June 7; Agricultural College, Michigan, June 10; Lafayette, Indiana, 

 June 2-July 11. I have taken it at Olcott, New York, July 4; Erie 

 County, New York, Jmie 4-July 22; Ridgeway, Ontario, June 29-July 

 15; and Chatham, Ontario, June 17, 



Type localities. — New York and Massachusetts, Aldrich reports 

 it from Kansas; Johnson from Riverton, New Jersey, July 3; Wood- 

 bury, New Jersey, June 7. 



No. 186. DOLICHOPUS VERSUTUS, new species. 



Male. — Length 6-6.5 mm.; of wing 5-5.5 mm. Face narrow, pale 

 golden yellow, more whitish below. Front green, sometimes coppery, 

 shining. Antennae almost wholly black, usually a very little brown- 

 ish, reddish, or even yellowish on the lower apical corner of the first 

 joint; third joint scarcely longer than wide, the tip distinctly pointed. 

 Lateral and inferior orbital cilia yellow, about seven of the upper 

 ciha on each side black. 



Thorax shining green; dorsum dulled a little with white pollen; 

 along the front, on the central part, the dorsum has the pollen more 

 brown and it is almost invisible except when viewed from the side, 

 sometimes with coppery reflections, which form vittae or spots on 

 the dorsum; pleurae a little dulled with whitish pollen. Abdomen 

 green, shining, with coppery reflections; the white pollen on its sides 

 abimdant and extending upon the dorsum. Hypopygium black; its 

 lamellae large and formed as in eudactylus; twice as long as wide, 

 whitish with a black border, jagged and bristly on lower half of 

 apical end, otherwise the lamellae are fringed with yellowish white 

 hairs, except at base above where there are a few black ones. 

 187829—21 17 



