[415] DIPTERA 29 



long hairs, hypopygium rather small, ascending, the claspers subhetn- 

 ispherical, thinly covered on the outer surface with rather long hairs, 

 on the posterior portion bearing an oval, hairy process, near the middle 

 of the inner side with a short, black, subcylindrical, hairy process, and 

 at the apex bearing a long hairy process nearly as long as the clasper, 

 of the shape of a half cylinder, the processes of the two claspers pressed 

 together and having a circular opening near the apex of the upper 

 side; filament appressed to the body of the hypopygium; front and 

 hind sides of the front and middle tibiae and under side of the middle 

 femora densely covered with rather long hairs, legs elsewhere more 

 sparsely covered with similar hairs, middle femora distinctly arcuate ; 

 wings whitish hyaline, stigma pale brown, veins normal, yellow and 

 brown, last section of fifth vein one and one-half times as long as the 

 preceding section, sixth vein reaches the wing margin but is colorless 

 from apex of anal cell two-thirds of distance to the wing margin. 

 Length 10 mm. A male specimen, collected July 9. 



Habitat. — Popof Island, Alaska. 



Type. — Cat. no. 5221, U. S. National Museum. 



Closely related to quinquelineata., but readily distinguished by the 

 unusually hairy legs and processes on the hypopygium. 



Rhamphomyia disparilis sp. nov. 



Male : Black, the halteres yellowish ; hairs of upper part of head, 

 antennae, mesonotum, scutellum, several on the tibiae and many on the 

 tarsi, black, remaining hairs yellowish ; eyes separated more widely 

 than the posterior ocelli, third joint of antennae slightly over twice as 

 long as wide, three times as long as the style, proboscis slightly longer 

 than height of head ; mesonotum slightly polished, not distinctly vittate, 

 its hairs short and sparse, scutellum bearing four bristles ; abdomen 

 polished, its hairs long and sparse, hypopygium very large, porrect, 

 lower outer angle of each clasper prolonged into a narrow, subconical 

 process about as long as the basal portion, hypopygium bearing many 

 very long bristly hairs, filament thread-like, the exposed portion fully 

 seven times as long as the first joint of the hind tarsi, the latter and the 

 second joint bearing many long hairs on their upper side, first joint of 

 front tarsi as thick as the tibiae, much thicker than that of any of the 

 other tarsi, middle tibiae on the outer side ciliate with a row of long 

 bristly hairs; wings hyaline, veins and stigma brown, venation normal, 

 last section of fifth vein nearly twice as long as the preceding section, 

 sixth vein obliterated before reaching the wing margin. Length 3 to 4.5 

 mm. 



