1945] 
New Species of P sammocharidce 
105 
TWO NEW SPECIES OF PSAMMOCHARIDCE 1 
By Nathan Banks 
Museum of Comparative Zoology 
In the course of rearranging the Museum collection of these 
insects, I found the two following new species. 
Arachnophila brevihirta sp. nov. 
Extremely similar to A . divisa Cresson in structure and color, 
the first two segments of abdomen being rufous above. On the 
propodeum the dorsal groove is scarcely, if at all, visible (dis- 
tinct in divisa). In the wings there are two slight differences; 
in the twelve specimens of divisa before me the third sub- 
marginal cell is triangular but not pedicillate, and the basal vein 
is exactly interstitial with the transverse ; in the eight specimens 
of brevihirta the third submarginal cell is distinctly pedicellate, 
and the basal vein ends a trifle before the transverse. The fine 
hairs on body and femora are shorter, except those at and near 
tip of abdomen, which are as long as in divisa ; those on head 
nearly one-half shorter, those on pronotum still shorter, those 
on propodeum fully one-half shorter, as are also those on basal 
part of abdomen; those on the femora are fully one-half shorter, 
this is most noticeable on the hind femora where the hairs are 
less than one-half the breadth of the joint (in divisa as long as 
breadth of joint). 
Length of fore-wing 5.5 to 7 mm. 
Type from Chicago, 111. July (C. T. Brues) M.C.Z. No. 
26739; paratypes from Chicago, 111.; Roggen, Colo. August 
(Rodeck); Sheldon, N. Dak. August (Stevens); Benzie Co., 
Mich., July (Dreisbach); and two with less red on abdomen 
from Chipawa Co., Mich., July (McAlpine) ; and Huron Co. 
Mich., August (Gaige). 
The Arachnophila septentrionalis Kincaid from Alaska is 
1 Published with the aid of a grant from the Museum of Comparative Zoology 
at Harvard College. 
