1926 ] 
Descriptions of a Few New American Diptera 
43 
from in front the lower corner of the eyes are as far apart as the 
length of inner orbit (in arcuatus very much closer.) 
Calobata kennicotti sp. nov. 
Black, face and cheeks silvery, front tawny except the dark 
triangle, not reaching as far forward as in C. pallipes, orbits 
silvery, occiput black; thorax black, clothed with white pubes- 
cence, especially prominent on pleura, on dorsum a bare shining 
black stripe each side above base of wings; abdomen black above 
and below, clothed above with prominent white hair, apical seg- 
ment largely brown, genitalia pale; legs pale, mid and hind 
tibiae beneath with dark mark at tip; wings hyaline, second 
vein ending in costa nearer to tip than to hind cross vein. 
Length 5 mm. 
Hudson Bay Territory (Kennicott). Separated from C. 
pallipes ( alesia ) by very different genitalia, as well as by marks 
of thorax. I have not seen C. nasoni, but that species is said to 
have on the genitalia a long filiform process; also to have a 
process between hind coxae, and yellow humeri, and the markings 
on the thorax do not agree, and the venter is pale. 
Leria (Amoebaleria) helvola var. angustifrons var. nov. 
The types (c?) of helvola have very hairy dorsum and the 
anterior dorso-central bristles weak, and the front of head, 
viewed from above is very much broader than long (inner eye- 
margin). There is in the East another form in which the male 
has much shorter hair on mesonotum (hardly longer than in 
other species), the anterior dorso-centrals are much longer, and 
the front of the head, viewed from above, is but little broader 
than long (inner eye-margin). The specimens are rather smaller 
than the typical form. Specimens come from Dead Run, Va., 
Black Mt., N. Car., Washington, D. C., Ithaca, N. Y. and N. Y. 
(Osten Sacken). 
