[409] 



DIPTERA 



Habitat. Virgin Bay, Prince William Sound, June 26; Kukak 

 Bay, July 4 ; Popof Island, Alaska, July 9 and 1 1. 



Type. Cat. no. 5210, U. S. National Museum. 



Closely related to virgata, but in that species the spinous bristles on 

 the ventral portion of the fifth abdominal segment in the male are ar- 

 ranged in a round cluster and none of them exceed one-fourth of the 

 length of this segment; both sexes have the mesonotum dark gray 

 pruinose and marked with three distinct, polished black vittae. 



Empis fumida sp. nov. 



Differs from the above description of pellucida only as follows : 

 Palpi and proboscis black, legs always wholly black, eyes of male less 

 widely separated than width of lowest ocellus, mesonotum highly 

 polished, not distinctly vittate, scutellum bearing six or more bristles, 

 hypopygium of male quite thickly covered with hairs, the central fila- 

 ment hidden except sometimes its apical portion, wings pale brown, 

 more yellowish at base and in costal cell. Length 7 mm. Six males 

 and four females. 



Habitat. Metlakahtla, in June ; Virgin Bay, June 26 ; Kukak Bay, 

 Alaska, July 4. 



Type. Cat. no. 5211, U. S. National Museum. 



Empis infumata sp. nov. 



Same as fumida except that the palpi and horny portion of the pro- 

 boscis are yellow, central filament of hypopygium of male free except 

 at the apex, no fringe nor cluster of spinous bristles on ventral portion 

 of the fifth or other abdominal segments, hind femora destitute of spi- 

 nous bristles on the under side, at most with a few weak bristles on the 

 apical fourth. Length 5 mm. One male and three females, collected 

 July 8 to ii. 



Habitat. Popof Island, Alaska. 



Type. Cat. no. 5212, U. S. National Museum. 



Empis brachysoma sp. nov. 



Black, the palpi, horny portion of proboscis, stems of halteres, fem- 

 ora, and tibiae yellow, front and hind femora in both sexes, and hind 

 tibiae in the male, yellowish brown, coxas brown basally, changing into 

 yellow at their apices, tarsi and knobs of halteres dark brown, apex of 

 male abdomen marked with yellow ; eyes of male contiguous, third joint 

 of antennas rather broad at base, quite rapidly tapering to the apex, about 

 twice as long as the style, proboscis twice as long as height of head ; 

 hairs and bristles of mesonotum black, hairs of pleura and abdomen 



