195 
the venation at the ends of the basal cells is much as in Cylindro- 
toma, and not as in Liogma and Triogma, the short cross vein be- 
ing present and as long as the peduncle of the third longitudinal 
vein. The discal cell is brief, and the upper of the three veins 
emitted from its extremity is deeply forked, so that there are five 
posterior cells. The tibiz are distinctly spurred, the spurs short. 
‘These characters hardly permit it to be classed with existing 
genera, though its relationship to the Cylindrotomini is intimate. 
I am the more assured of the correctness of this view because of 
the existence in the collection made at Florissant for the U. S. 
Geological Survey of another allied genus, hitherto unknown, which 
has a single submarginal cell and spurred tibize, and in which the ' 
first longitudinal vein ends in precisely the same manner, though 
the auxiliary vein certainly ends in the costa immediately pre- 
vious to it. Unfortunately most of the remainder of the neuration 
is obscured in the single specimen seen (No. 1470). 
Oryctogma sackenil. 
Pere ue Os 
5 
Wings ample, three and a half times longer than broad. The 
auxiliary vein appears to end free somewhat before the base of the 
third longitudinal vein. The stigma is distinct, somewhat broad 
and triangular. The second longitudinal vein arises in a faintly 
clouded spot at some distance beyond the middle of the wing with- 
out basal arcuation, the prefurca being straight and but little 
shorter than the apical portion of the vein. ‘The marginal cell is 
only as long as the breadth of the wing and rather broad in the 
middle. ‘The discal cell is distinctly shorter than the third posterior 
cell, considerably broader apically than at base. The second pos- 
terior cell has a short peduncle ; the fifth posterior cell is about 
twice as long as broad, narrowinga little apically. The fifth longi- 
tudinal vein is somewhat bent at the great cross vein; the seventh 
longitudinal vein is straight like the sixth and ends at or before the 
middle of the wing. A faint cloud attends the cross veins at the 
end of the basal cells. 
Length of wings, 13 mm. ; fore femora, 5.5 mm. ; tibiz, 8 mm. ; 
tarsi, 12.5 mm.; mid femora, 7 mm. ; tibiz, 8.5 mm. ; tarsi, rr 
mm. ; hind femora, 7 mm. ; tibiz, 7.5 mm. ; tarsi, 12 mm. 
Florissant, Colorado. One specimen, No. 206. 
