1917] Banks—New Species of the Genus Dioctria (Asilida) 117 
posterior lateral angles as follows: Segment 2, a short hair; seg- 
ment 3, a long hair; segment 4, a long hair; segment 5, two long 
hairs; segment 6, two long hairs; segment 7, a long hair; segments 
3 to 7 each with a long hair arising just mediad of the lateral angles; 
segment 8 with two long hairs laterally; a pair of long, subterminal 
hairs before the deeply emarginate posterior tip. 
ed 5 
Type: Catalogue No. 21367. U.S. Nat. Mus. 
5 
NOTES ON SOME NEW SPECIES OF THE GENUS 
DIOCTRIA (ASILID). 
By NatHan Banks, 
Museum of Comparative Zoology, Cambridge, Mass. 
Our Eastern specimens of the genus Dioctria have all been 
placed in the species albius Walker. In examining our specimens 
I note, however, two types of male genitalia. In one, the northern 
form, the superior plate has two broad lobes, sometimes standing 
out flat, sometimes rolled down over the other parts; in the other 
more southern specimens the superior plate is divided into two 
long tapering parts ending in a knob-like enlargement, with a tooth 
on the inner surface and a pencil of yellow hair on the outer edge. 
The northern form is the true albiws Walker; it has the third anten- 
nal joint short, and with a very short style; the mystax is black; 
the body is rather longer than in the southern forms. The south- 
ern forms I divide into two species, one with the antenne like 
D. albius; the other with the third joint and style much longer; 
both are new. 
Dioctria brevis sp. nov. 
Black, bronzy as in D. albius, and in general similar to that 
species; the third antennal joint barely if any longer than in 
D. albius. It differs at once, in the shape of the superior plate of 
the male genitalia, having two long tapering divisions, rather 
swollen at their tips, with a sharp, slender tooth on the inner 
side shortly before tip, and on the outer side a pencil of yellow hair. 
Specimens are 8 to 10 mm. long, and come from Sea Cliff, N. Y.; 
Medina, Ohio; Englewood, N. J.; and north fork Swannanoa River, 
Black Mountains, N. C. 
Type: M. C. Z. 10032. 
