[4 11 ] DIPTERA 25 



Empis conjuncta sp. nov. 



Differs from the above description of triangula only as follows : 

 Legs and venter of abdomen dark brown, proboscis shorter than height 

 of head, hypopygium of male wholly and sparsely covered with bristly 

 hairs, destitute of a cluster of these hairs, the dorsal piece bearing a 

 pair of long, subcylindrical, fleshy processes, which are covered with 

 short hairs, filament free. Length 2.5 mm. One male and two females. 



Habitat. Sitka, June 16; Orca, Alaska, June 27. 



Type. Cat. no. 5215, U. S. National Museum. 



Classified by its short proboscis, this species would be placed in the 

 genus Hilara ; but its elongated third antennal joint with the minute 

 style, the contiguous eyes of the male and the slender first joint of his 

 front tarsi, indicate a nearer relationship with the typical species of the 

 genus Empis. 



Hilara aurata sp. nov. 



Black, the first two antennal joints and the legs dark brown, the 

 knees and halteres yellow ; upper part of occiput and sides of front 

 velvet black, middle of front below the lowest ocellus, face, cheeks, and 

 lower part of occiput gray pruinose; eyes of male almost as widely 

 separated as the posterior ocelli, third joint of antenna? conical, slightly 

 longer than broad, subequal in length to the style, proboscis as long as 

 height of head, hairs of palpi and under side of head whitish, those of 

 occiput yellowish brown; thorax slightly polished, marked with three 

 indistinct black vittse, almost bare, in the middle, behind the suture, 

 with a golden yellow pubescence, no hairs in front of the halteres, 

 scutellum bearing four bristles and a few short hairs ; abdomen slightly 

 polished, its hairs yellow, hypopygium of male small, nearly bare; 

 legs destitute of long bristly hairs, first joint of front tarsi of male 

 greatly swollen; wings hyaline, veins yellow, stigma pale yellowish, 

 venation normal. Length 4 mm. A female specimen, collected July 

 4. The U. S. National Museum contains a male specimen collected at 

 Eastport, Maine, July i, 1870, by Mr. Edward Burgess. 



Habitat. Kukak Bay, Alaska ; Eastport, Maine. 



Type. Cat. no. 5216, U. S. National Museum. 



Hilara transfuga Walker. 



Hilara transfuga WALKER, List Dipt. Ins. Brit. Museum, in, p. 491, 1849. 



Berg Bay, June 10; Popof Island, Alaska, July 6 to 10: Ten speci- 

 mens. Originally described from Albany River, British America. 



