1918] Dipterous Genus Drapetis Meigen 195 



bristles, or apical spur. Halteres black. Wings oval, the second, 

 third and fourth sections of the costa proportioned 1.3 : 1.8 : 1, 

 third and fourth veins subparallel, the first posterior cell a little the 

 widest before its tip, anterior cross- vein before the middle of the discal 

 cell, segments of the fourth vein proportioned 1 : 2.3, of the fifth vein, 

 1.(5 : 1, marginal cilia uniformly short. 



Type specimen: Nelson, British Columbia, July 17, 1910. 

 Paratype: Priest Lake, Idaho, August 1, 1915 (Melander). In 

 author's collection. 



Drapetis micropyga, sp. nov. 

 cf . Length, l.o mm. Black, shining, legs simple without bristles, 

 black, the front coxae and knees brown, antennae short, halteres black, 

 third and fourth veins nearly parallel. Head round, orbits shining, 

 bottom of the front one-half as wide as the second joint of the antennae, 

 face linear, cheeks obliterated, proboscis very short, palpi blackish, 

 brown-hairy and without an apical seta; second antennal joint without 

 seta beneath, the third joint short oval, not longer than wide, the 

 subterminal arista slender, twice as long as the antennae. Pubescence of 

 the mesonotum short and dense, no discal bristles, the lateral bristles 

 confined to three or four in front of the root of the wings, lateral 

 scutellars small ; pleurae with tomentum in front of the wings and beneath 

 the humeri. Abdomen subshining, nearly bare, hypopygium small, 

 rounded, closed, with uniform short, brown hairs. Wings hyaline, the 

 second, third and fourth sections of the costa proportioned 1 : 1.5 : 1, 

 first posterior cell slightly widening toward the tip, fourth vein ending 

 beyond the apex of the wing, its outer two sections proportioned 1 : 7, 

 sections of the fifth vein equal, anterior cross-vein at two-thirds the 

 length of the second basal cell, marginal cilia uniformly short. 



Pullman and Almota, Washington: Moscow Mountain, 

 Idaho. A male from Washington, D. C, does not offer any 

 differences. 



Drapetis naica, sp. nov. 



1.2 mm. Black, with simple black legs, third vein curving forward, 

 first vein ending near the middle of the wing, hypopygium small. Head 

 higher than wide, orbits not pollinose, front, face and cheeks very 

 narrow, palpi yellowish, the terminal hair pale, proboscis short, black; 

 antennae short, ascending, the second joint without a seta beneath, the 

 third joint ovate, one-fourth longer than broad, the slender terminal 

 arista one and three-fourths times the antennal length. Thorax with 

 uniform, short, fine, brown hairs, about eight rows of eighteen acrostichal 

 hairs, no humeral, three supraalar, four scutellar, bristles; pleurae pol- 

 ished; abdomen shining, the sides of the middle segments subopaque 

 and with brown setulae; hypopygium small, rather triangular in profile, 

 its valves not open. Front coxae and knees brownish, posterior femora 

 with a single preapical bristle, spur of the hind tibia? long but blunt, 

 metatarsi not setulose. Halteres blackish. Wings hyaline. \'eins 



