THE CANADIAN ENTOMOLOGIST 63 
deflection of Cm at or just beyond the fork of M, about in a h'ne 
with cross-vein r-ni; cross- vein m rather indistinct. 
Abdominal segments" dark brown, the cauchil and hUeral 
margins narrowly paler, hypopygium with the pleurites bright 
yellow. 
The female is similar to the cf but slighth' larger, full-winged; 
ovipositor powerful, yellow, strongly upturned. 
Habitat. — Colorado. 
Ilolotype, d", Platte Canon, Colorado, July 17,1915, (Oslar.) 
Allotype, 9 , with the type. 
This little species differs from both debilis Will, and vitripcnnis 
Doane, in the considerably smaller size; it differs from debilis in 
the paler fawn colour of the body, the long petiole of cell Mi, the 
structure of the antennae, and in numerous other details; from vitri- 
pennis in the gray head, dark antennae, differences in the thoracic 
pattern and colour of the abdomen and its appendages. It diflers 
from the more closely related septentrionalis Bergr. in the unmarked 
wings and fawn-coloured body. 
Tricyphona glacialis, sp. n. 
Allied to T. debilis Will.; colour dark brown; antennae dark 
brown throughout, the flagellar segments oval to rounded-oval,, 
not attenuated; wings with a pale brown suffusion; cell 1st Ah and 
and Ml very long; abdomen dark brown, the l:)asal sternites more 
yellowish. 
Male. — Length 9.6 mm.; wing 10.6 mm. 
Rostrum and palpi dark brown. AntenucC dark brown, the 
segments of the flagellum oval, the basal ones not crowded, the 
apical ones shortened, almost rounded. Head broad, black, \er\' 
sparsely grayish pruinose; frontal tubercle distinct, high. 
Mesonotum dark brown, very sparsely gray pruinose on the 
postnotum, the scutellum paler, more yellowish. Pleura dark 
brown, gray pruinose. Halteres very long and slender, brown, 
brightened at the extreme base. Legs with the coxae brownish 
yellow; femora dull yellow, passing into brown on the apical third; 
tibice brownish yellow, a little brighter basally; tarsi dark brown. 
Wings with a pale brown tinge; stigma indistinct; veins brown. 
Venation: petiole of cell Ri moderate, a little shorter than the 
elongated cell 1st Mi; petiole of cell Mi about one-third the length 
