1923 ] 
The Genus Crytopogon 
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hairs of middle tibiae long and black, of hind tibiae almost bristle- 
like, forming rows on extensor and anterior faces, claws black, 
pulvilli alutaceous. Halteres of each specimen with rosy knob, 
calypteres yellowish; wings hyaline, veins black, anterior cross- 
vein at one-third the length of the discal cell, anal cell open as 
widely as the length of anterior crossvein or less. 
Female . — White hairs predominating on vertex and upper 
part of face, marginal bristles of scutellum stronger, white pruino- 
sity of abdomen more extended, the second third and fourth 
segments with shining narrow base, expanding as an anterior 
quadrate shining spot at side margin, remainder of segment white 
pruinose, posterior segments similarly colored except that the 
lateral expanse of shining area is more triangular, seventh and 
eight segments polished black. Tibial bristles stronger. 
Types . — South slope of Mount Adams, Washington, July 
24, 1921. (Melander). Two males, seven females, taken at an 
elevation of 4000 feet. 
Crytopogon glarealis, new species 
Male . — Length 14 mm. Head with golden tomentum, upper 
hairs rather sparse and black, mystax black, the lowermost 
hairs mixed with golden, beard white, third antennal joint red- 
dish-yellow, style black and one-fifth the length of the third joint. 
Mesonotum with fulvous pollen, middle stripes very indistinct, 
humeri and postalar callosities shining, pollen denuded on pos- 
terior half of thorax except a quadrate spot next to scutellum, 
scutellum convex and shining except for a touch of pollen at 
middle of base, notal hairs sparse and black, scutellar 
hairs mostly black, not dense, no marginal bristles; pleurae uni- 
formly dusted with brown-gray pollen, meso and sternopleurse 
pilose, hypopleural hairs black, the lowermost brown. Ab- 
domen mostly polished, segments two to four with yellowish 
posterior fasciae, the tomentum extending along middle of seg- 
ments two, three, four and anterior two-thirds of segment five 
as a dorsal vitta, pile of abdomen entirely black, short, tufted on 
sides of second segment; base of hypopygium with stubby black 
