596 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
Trichochlamys borealis Czerny 
Trichochlamys borealis Czerny, 1924, p. 155; 1927a, p. 45. 
I have examined 2 females of this species in the collection of the 
U.S. National Museum. The species was described by Czerny from 
a single female specimen. 
FremMaLre.—Front and base of antennae reddish orange, third antennal 
segment becoming brownish; aristae dark brown to black, minutely 
pubescent; ocellar triangle and back of head gray; face and cheeks 
brownish yellow; anterior and posterior fronto-orbital bristles approxi- 
mately equal; front with dense setae; 2 or 3 oral vibrissae; setae 
covering all but upper anterior part of cheeks; cheek-eye ratio 0.6. 
Thorax ash gray, with humeri yellowish; brownish patches at bases 
of dorsocentrals and an irregular broad brown vitta between the 
dorsocentrals; sides of scutellum with brownish vittae covered with 
long hairs; scutellum with longitudinal depression in midline; pro- 
pleuron, mesopleuron, sternopleuron, and anterior half of pteropleuron 
covered with dense hairs; 1 sternopleural bristle. 
Legs with femora grayish, becoming yellowish brown distally; mid- 
dle tibia with several ventral apical bristles and the usual dorsal 
preapical bristle. 
Wings with brownish tinge; costal bristles relatively short. 
Abdomen dark gray. 
Lreneta.—7.0 mm. 
DistRIBUTION.—Copper [Medny] Island, of the Commander [Ko- 
mandorski] Islands, in the Bering Strait; May. 
Doubtful Species 
The following species have been cited from North America, but I 
am not familiar with the characters of these species and have been 
unable to place them in the present study: 
Heteromyza fusca Macquart, 1848, p. 263. North America. 
Helomyza fasciata Walker, 1849, p. 1094. Nova Scotia. 
Literature Cited 
Aupricu, J. M. 
1896. On a collection of Diptera from Indiana caves. 21st Ann. Rep. 
Dep. Geol. Nat. Res. Indiana, pp. 188-190. 
1905. Catalogue of North American Diptera. Smithsonian Misc. Coll., 
vol. 46, no. 1444, pp. 571-574. 
1910. A decennial confession. Canadian Ent., vol. 42, no. 4, p. 100. 
1922. A new genus of Helomyzidae. Bull. Brooklyn Ent. Soc., vol. 17, no. 
4, pp. 108-109. 
1926. A new genus of Helomyzidae from Chile with key to genera. Ins. 
Inse. Menstr., vol. 14, nos. 4-6, pp. 96-102. 
