216 
great cross vein strikes the middle of the discal cell, and the fifth 
posterior cell is hardly twice as long as broad. There is a distinct 
supplementary cross vein in the middle of the second basal cell, 
lying outside a point opposite the base of the preefurca. The legs 
are relatively stout, the femora apically blackened. 
Length of wings, 6.5 mm.; breadth, 2.25 mm.; length of fore 
femora, 3.5 mm. ; tibiz, 4.75 mm. ; tarsi, 4.6 mm.; mid femora, 
3-75 mm. ; tibie, 4.75 mm. ; hind femora, 4.6 mm. ; tibiz, 5 mm. 
Florissant, Colorado. One specimen, Nos. 7954 and 10399. 
Cladura integra. 
Play isis: 
Wings almost four times as long as broad, hyaline and immacu- 
late except for the faintest possible infumation on the stigma. The 
auxiliary vein ends but little before the middle of the apical half of 
the wing, between the origin of the third longitudinal vein and the 
base of the first submarginal cell; the subcostal cross vein lies but 
a short distance from the tip of the auxiliary vein. The prefurca 
arises at about the middle of the wing, is arcuate at base, beyond 
straight, divergent and rather distant from the first longitudinal 
vein, and is distinctly shorter than the rest of the vein. ‘The mar- 
ginal cross vein lies as far beyond the base of the first submarginal 
cell as the length of its petiole. The third longitudinal vein is not 
bent at the base, the cross vein uniting it to the branch of the 
fourth longitudinal vein meeting it at the very base ; consequently 
the second submarginal and first posterior cells are equal in length, 
and they are much longer than the breadth of the wing. The 
petiole of the second posterior cell is very much shorter than the 
cell, the discal cell is less than twice as long as broad, equal and 
hardly more than half as long as the posterior cells beyond it. The 
great cross vein strikes the discal cell near its base and the fifth 
posterior cell isseveral times longer than broad and equal, the fifth 
longitudinal vein being hardly bent. Legs very slender. The 
sides of the abdomen are distinctly darker than the dorsum. 
Length of wings, 10.5 mm. ; breadth, 2.6 mm. ; length of fore 
femora, 5.5 mm. ; tibize, 6.75 mm. ; tarsi, 6.25 mm. ; hind femora, 
6 mm. ; tibia, 7.5 mm. ; tarsi, 6 mm. 
Florissant, Colorado. One specimen, No. 1590. 
