64 Psyche [June-Sept. 
Boreus gracilis Carp. 
Psyche, 42:118; 1935. 
A series of ten specimens (33,79) of this insect were 
sent to me by Mr. Lloyd. 1 $ was collected at Kennecott, 
Alaska, April 15, 1935 ; and the rest at McCarthy, Alaska, 
April 29, 1935. This series is particularly interesting 
because the species has previously been known only from 
the two female types, and it now turns out that the type 
specimens were slightly damaged. The male is 3 mm. long; 
uniformly black except for the eyes (which are either black 
or dark brown) and the wings, which are sometimes brown- 
ish ; the body including the wings but not the pronotum is 
covered with rather long white pilosity resembling that of 
B. nix , but not quite so prominent ; pronotum with two rows 
of very long black hairs; wings, with the outer margin 
almost straight as in B. elegans Carp, (see Psyche, 42, fig. 
8, p. 121) ; hypandrium deeply emarginate, as in B. nix 
Carp. (Psyche, 42, fig. 7, p. 121) ; rostrum one and one-half 
times as long as the eye. One of the specimens taken at 
McCarthy, Alaska, April 29, 1935, is designated as the allo- 
type and deposited in the Museum of Comparative Zoology. 
The female is correctly described in my original account 
of the species, except that the body is covered with the long 
pilosity mentioned in the male; apparently the two type 
specimens were so badly rubbed that only the bases of the 
hairs remained, giving the appearance of a fine pubescence. 
The size of the wing pads seems to vary slightly but in the 
specimens so far collected the pads are shorter than in the 
other Nearctic species of Boreus, except of course reductus 
Carp. 
This insect resembles B. nix Carp., from Montana, but 
is readily separated by the nearly straight outer margins 
of the wings in the male. Gracilis is the first Alaskan species 
found which possesses an emarginate hypandrium. 
