128 
Psyche 
[June- August 
long as distance between cross veins; basal section of third vein 
less than one-half as long as last section of second vein and 
less than two times as long as second section of fourth vein; 
fourth vein not reaching wing-margin; fifth vein extending beyond 
outer crossvein. Abdomen as long as thorax, fuscous, margins 
of segments lighter; second segment one and one-half times third. 
Halteres fuscous. 
Length: 2 mm. 
Type.-. Male; Oroville, Wash. (Melander). 
Paratypes .. — Seven specimens from the following localities: 
Washington: Oroville, Pullman (Melander). 
British Columbia: Bear Lake (U. S. N. M.) 
Leptocera (Opacifrons) wheeleri n. sp. (Fig. 4). 
Front olivaceous black; ocellar triangle bordered on each 
side by a conspicuous lunate silvery-pollinose spot, lower frontal 
triangle depressed and with sloping sides, because of the sloping 
sides the depressed portion of the frontal triangle appears to have 
a different color than the rest of the front; bristles not very 
conspicuous; interfrontal bristles in five pairs, increasing in 
size anteriorly to middle pair, then decreasing, but not cruciate; 
face and cheeks silvery pollinose; face shallowly concave in 
profile; oral vibrissae short; bucca with a distinct anterior 
bristle and a few posterior setae; oral setulae distinct; antennae 
moderate in size, third joint with whitish pubescence; arista 
two and one-half times antennal length, microscopically pubes- 
cent. Thorax and scutellum glistening black with an opaque 
brownish pollinose stripe between the base of the wings and the 
humeri; dorsocentral bristles in four pairs; acrostichal setulae 
very fine and short, arranged in eight rows between the anterior 
pair of dorsocentral bristles; scutellum trapezoidal, blunt at 
tip; marginal bristles four; pleurae with the exception of the 
extreme upper portion, white-pollinose ; upper sternopleurae 
with a strong posterior bristle and minute anterior setae. Legs 
black; tarsi brown; femora and tibiae slightly gray dusted; all 
