THE DIPTEROUS GENUS DOLICHOPUS IIST NORTH AMERICA. 233 



Fore coxae yellow with a small brown spot on outer side at base, 

 anterior surface with white pollen and a few little black hairs, which 

 are mostly on inner half; middle tarsi black with yellow tips; hind 

 coxae yellow, blackish on most of the outer surface. Femora and 

 tibiae yellow. Middle and hind femora each with one preapical 

 bristle, the latter with a row of delicate little yellow hairs on lower 

 inner edge, which are not long enough to call cilia. Middle tibiae 

 with one large bristle below. Posterior tibiae scarcely thickened, 

 very slightly brownish on inner side at tip; they have a glabrous 

 stripe on inner surface just inside of the inner row of large bristles; 

 it is widest near the base and does not reach base or tip. Fore 

 tarsi one and a fourth, middle tarsi one and a third times as long as 

 their tibiae, black from the tip of the first joint; fore tarsi with the 

 first joint longer than the following two taken together, fourth and 

 fifth of equal length; middle basitarsi without a bristle above. Hind 

 tarsi black from the tip of the first joint. Calypters and halteres 

 yellow, the former with black cilia. 



Wings (fig. 169) a little grayish; costa a little thickened at tip of 

 first vein, gradually tapering; last section of fourth vein bent be- 

 yond basal third; in one specimen the cross vein has a stump vein at 

 its middle; hind margin of wing scarcely indented at tip of fifth 

 vein, rather evenly rounded, the anal angle being rounded but 

 rather prominent. 



Described from 2 males taken at Hopedale, Labrador, by Prof. 

 A. S. Packard. 



Type. — In the Museum of Comparative Zoology at Cambridge, 

 Massachusetts. 



No. 170. DOLICHOPUS HARBECKI, new species. 



Male. — Length 4.5-5.5 mm.; of wing the same. Face rather 

 narrow and long, silvery, with a yellowish tinge. Front green with 

 grayish pollen. Antennae "(fig- 170&) black; first joint yellow on the 

 lower half; third nearly round in outline, slightly pointed at tip. 

 Lateral and inferior orbital cilia white, about six of the upper cilia 

 on each side black. 



Thorax green with slight bronze reflections; dorsum with thick 

 gray pollen along the front, which is usually sharply limited, all 

 the upper portion being covered with almost invisible brown pollen; 

 the large bristles are inserted in minute brown dots; pleurae dulled 

 with grayish pollen. Abdomen green with coppery reflections; the 

 white pollen on its sides abundant. Hypopygium black; its lamellae 

 of moderate size, somewhat triangular, yellowish white with a black 

 border on the apical margin, jagged and bristly on lower half of the 

 apical edge, the upper half being fringed with slender brown hairs, 

 the upper and lower edges with minute pale hairs : there is a pair of 



