30 COQJJILLETT [4^6] 



Female : Differs from the male as follows : Anterior half of meso- 

 notum opaque, gray pruinose, marked with four polished black vlttae, 

 the remainder of thorax, scutellum, and first five segments of abdomen, 

 densely silvery white pruinose, hairs of abdomen rather short, hind 

 tarsi and middle tibiae destitute of long, bristly hairs, first joint of front 

 tarsi narrower than the tibiae, not so thick as that of the hind tarsi; 

 discal cell prolonged almost to the wing margin, fourth vein not pro- 

 longed beyond its apex, no vein between second and third posterior 

 cells, last section of fifth vein about one-sixth as long as the preceding 

 section. Length 4 to 5 mm. 



Five males and six females. 



Habitat. — Yakutat, June 21 ; Virgin Bay, Alaska, June 26. 



Type. — Cat. no. 5222, U. S. National Museum. 



Closely related to limbata and irregularis^ but in those species the 

 lower outer angle of the male claspers is rounded, and the fourth vein 

 in both sexes is prolonged to the wing margin. 



Rhamphomyia glauca sp. no v. 



Black, the halteres light yellow, hairs and bristles black ; eyes of 

 male contiguous, third joint of antennae slightly over twice as long as 

 wide, about four times as long as the style, proboscis about as long as 

 height of head; body opaque, bluish gray pruinose, hairs sparse and 

 rather short, scutellum bearing four bristles, hypopygium rather small, 

 obliquely ascending, bearing several long bristly hairs, claspers elon- 

 gate conical, filament thread-like, the exposed portion about five times 

 as long as first joint of hind tarsi, the latter much thicker than that of 

 any of the other tarsi, much narrower than the tibise, hind tibiae of 

 male outwardly bearing several rather long bristly hairs, in the female 

 ciliate with nearly erect scales, wings hyaline, stigma pale yellowish, 

 veins yellowish brown, normal, last section of fifth vein over twice as 

 long as the preceding section, sixth vein reaches the wing margin. 

 Length 3 to 4 mm. A specimen of each sex. 



Habitat. — Metlakahtla, June 4 ; Berg Bay, Alaska, June 10. 



Type. — Cat. no. 5223, U. S. National Museum. 



Near priapulus., but in that species the sixth vein is obliterated be- 

 fore reaching the wing margin and the hind tibiae of the female are 

 not ciliate with scales. 



Rhamphomyia cineracea sp. nov. 



Differs from the above description of glauca only as follows : Mes- 

 onotum slightly polished, thinly dark gray pruinose, hairs of male 

 hypopygium sparse and rather short, the claspers suboval, near apex of 



