[4 21 ] DIPTERA 35 



as that of any of the other tarsi ; hairs on outer side of hind tibia* 

 sparse and rather short, the inner side only pubescent; wings grayish 

 hyaline, veins and stigma dark brown, last section of fifth vein over 

 three times as long as the preceding section, sixth vein prolonged to 

 the wing margin. Length 3 mm. A male specimen, collected June 16. 



Habitat. Sitka, Alaska. 



Type. Cat. no. 5231, U. S. National Museum. 



Rhamphomyia macrura sp. nov. 



Black, the hairs also black, stems of halteres yellow, the knobs 

 brown ; eyes of male contiguous, third joint of antennae four times 

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

 than height of head ; thorax opaque, gray pruinose, mesonotum marked 

 with three slightly polished, black vittas, its hairs sparse and rather 

 long, scutellum bearing six bristles, abdomen slightly polished, thinly 

 gray pruinose, rather thickly covered with long hairs, hypopygium 

 unusually long, ascending, claspers subtriangular, very sparsely covered 

 with long hairs, at the apex bearing an elongate ovate process, like a 

 second joint, more than one-third as long as the basal part and densely 

 beset with long hairs on the lower side and apex, filament bristle-like, 

 the exposed portion over five times as long as the first joint of the hind 

 tarsi ; hairs of hind tibiae sparse and rather short, first joint of front 

 tarsi sublanceolate, thicker than the tibia? and nearly twice as thick as 

 that of the hind tarsi; wings grayish, pale smoky in the costal cell, 

 stigma and veins dark brown, last section of fifth vein one and one- 

 half times as long as the preceding section, sixth vein prolonged to the 

 wing margin. Length 4 to 5 mm. Ten males. 



Habitat. Sitka, June 16; Yakutat, June 21; Virgin Bay, June 

 26; Orca, Alaska, June 27. 



Type. Cat. no. 5232, U. S. National Museum. 



Near clavigera, but in that species the first joint of the front tarsi 

 is not thickened. 



Ocydromia glabricula (Fallen) . 



Empis glabricula FALLEN, Diptera Sueciae, Empidae, p. 33, 1816. 



Sitka, Alaska: A single specimen, taken June 16. This European 

 species was reported as occurring in this country twenty-two years 

 ago. The U. S. National Museum contains a specimen collected in 

 Colorado. 



Platypalpus lateralis Loew. 



Platypalpits lateralis LOEW, Berliner Ent. Zeitsch., p. 89, 1864. 



Muir Inlet, June 12; Sitka, June 16; Yakutat, June 21; Popof 



