Vol. XI] VAN DUZEE— PRIBILOF ISLANDS DIPTERA 167 



A NEW SPECIES OF THE DIPTEROUS FAMILY 



DOLICHOPODIDiE FROM THE PRIBILOF 



ISLANDS, ALASKA 



BY 



M. C. VAN DUZEE 



Hydrophorus fumipennis Van Duzee, new species 



Female: Length 4 mm. Face wide, shining coppery, its lower 

 edge nearly straight, palpi brownish yellow. Front seal-brown. 

 Antennae black, rather short; third joint small, about as long 

 as wide ; arista about as long as the antenna. One pair of post- 

 verticals ; postorbitals about eight on each side, reaching but 

 little more than one-third the eye height, black. Beard yellow, 

 almost golden, not very abundant. 



Thorax brown with about six or seven dorsocentrals in each 

 row ; acrostichals black, in a single row ; pollen on upper half 

 of the pleurae brown, on lower half and on the coxae whitish. 

 Propleura with one black bristle above the fore coxa. Scutellum 

 with two pair of bristles. Scutellum and abdomen coppery- 

 bronze colored. 



Fore coxae, tibiae and femora bronze; middle and hind 

 coxae and all tarsi blackish. The anterior surface of fore coxae 

 covered with minute white hairs, and with a row of 12 or more 

 small black bristles of nearly equal length on the outer edge, these 

 scarcely as long as thickness of tibia. Fore femora considerably 

 thickened, appearing to have two rows of close-set, short spines 

 on the whole length of its lower surface ; fore tibiae nearly straight, 

 with a distinct angle at tip projecting a little towards the femora, 

 and with short spines nearly the whole length of its inner surface, 

 nearly as long as those on the femora. Fore tarsi as long as 

 their femora; first joint as long as the two following joints taken 

 together, last four joints of nearly equal length. Middle femora 

 and tibia each about as long as the abdomen ; middle tarsi scarcely 

 more than half as long as their tibiae, the first two joints shorter 

 than those following, the second being the shorter, about half 

 as long as third. Halteres altogether black. Calypters black with 

 yellowish cilia. 



Wings brown in front of fourth vein and along the fifth and 

 cross veins, a small spot at base, a slender streak in the center 

 of the marginal cell, and a spot at tip of the submarginal cell, 

 which is gray; the center of the first posterior cell also a little 

 grayish; third vein bending forward a little just before its tip 

 as it often does in this genus. 



