114 
Psyche 
[June 
The hypandrium is entire and broadly triangular in out- 
line (figure 15). The body is covered with a very short 
pubescence ; the beak is short, about one and one-half times 
as long as the eye, and only half as long as the ovipositor. 
Boreus nix n. sp. (Figure 7.) 
Male : length of body, 3 mm. ; uniformly black except the 
eyes, which are either black or dark brown or both ; entire 
body including wings covered with long, white pilosity, ex- 
cept pronotum, which bears two rows of very long heavy 
black hairs, one row along the anterior margin, the other 
along the posterior margin; wings with the outer margin 
smoothly curved, as in unicolor (see Carpenter, 1931, fig. 
6d) ; hypandrium broadly triangular, deeply emarginate 
(figure 7) ; rostrum short, less than one and one-half times 
the length of the eye. 
Female : length, 4 mm.; entire body, including wings, 
black and covered with long white pilosity; ovipositor one 
and one-half times the length of the rostrum; fore wing 
covering entire hind wing scar. 
Holotype ( $ ) and allotype : Gird’s Creek, Ravalli County, 
Montana, November 2, 1934, on snow (W. L. Jellison) ; both 
in Museum of Comparative Zoology. 
Paratypes : 1 $ with same collecting data as holotype ; 2 
$ , 2 $ , Hamilton Heights, Ravalli County, Montana, Nov- 
ember 15, 1931, on snow (C. B. Philip) ; all in writer’s col- 
lection; 1 ? Hamilton Heights, Ravalli County, Montana, 
November 15, 1931, in collection of the California Academy 
of Sciences. 
This interesting species is easily recognized by the com- 
bination of the black wings, emarginate hypandrium, and 
long, white pilosity. The latter is visible without magnifi- 
cation and gives the insect a fuzzy appearance. 
Boreus pilosus n. sp. (Figure 10.) 
Male : length, 3 mm. ; wings light brown, genital claws 
and hypandrium brown, legs light brown or dark brown; 
eyes dark brown or black; rest of body black; entire body 
covered with long, yellowish-white pilosity, especially well 
developed on the abdominal terga ; pronotum with two rows 
