358 THE BLOWFLIES oF NortH AMERICA 
and not widening much below the vibrissae, which are only 
slightly above the oral margin. 
Middle femur with three strong anterior bristles near middle 
and a basal posteroventral row of bristles; middle tibia with 
three anterodorsal bristles, two ventral brisdee three posterior 
bristles, and three posterodorsal bristles; hind tibia with two 
anteroventral bristles. 
Male. Unknown. 
Length. 8.5 mm. 
Type. Female, No. 54938, U. S. National Museum. 
Type locality. Genesee, Idaho. 
Two female specimens were collected at an altitude of 2, 000 
ft., May 28, 1936, by R. E. Miller. 
Melanodexiopsis nox, new species 
A species with the general aspect of tristina but which has the 
middle tibia provided with a ventral bristle. _ 
Male. Head height 10.8; width 10.7; eye height 7.8; length at 
antenna 7.2 and at vibrissa 6.5; parafaciale 2.0 in width opposite 
lunule; distance between vibrissae 2.5; front at narrowest 0.09 
of head width, 0.17 at vertex and 0.51 at lunule; bucea 0.33 eye 
height; frontal bristles in a single row; antenna short, only ex- 
tending three-fourths the distance to the vibrissae, second an- 
tennal segment one-half as long as third; facial carina low and 
not very apparent; epistoma elongate and slightly narrowed at 
vibrissae which are much above the oral margin. 
Thorax with two postacrostichal bristles. 
Wing with apical cell either closed in margin or but slightly 
open. 
Legs with middle femur with three anterior bristles near 
middle; middle tibia with three anterodorsal bristles, one ven- 
tral bristle near apical third, three posterior bristles, and one 
or two posterodorsal bristles; hind tibia with three or four 
posterodorsal bristles. 
Female. Unknown. 
Length. 8-9 mm. 
Type. Male, No. 54941, U. S. National Museum. 
Type locality. Hood River, Ore. 
Four male specimens: The type, and one paratype collected 
July 14, 1917, Claremont, Calif. (Baker), one labeled Oregon 
eeeat other data), and one, Seattle, Wash., from my collee- 
tion. 
