206 
Third longitudinal vein arising about the middle of the wing; great cross vein 
striking the fourth longitudinal vein before the discal cell... ./caria. 
Third longitudinal vein arising well beyond the middle of the wing; great 
cross vein striking the fourth longitudinal vein at the base of the discal 
| Ne Ge ee ae Ft. eaye oe RR MAES ra co tae loewt. 
Rhamphidia saxetana. 
Pl. 3, fig. 4. 
An exceptionally large species. The auxiliary vein ends opposite 
the origin of the third longitudinal vein, but the position of the 
subcostal cross vein cannot be made out. ‘The prefurca arises at 
the middle of the wing, is arcuate at its base and then subparallel 
to the first longitudinal vein, and not half so long as the remainder 
of the vein. The first longitudinal vein is carried much farther 
toward the apex of the wing than in the other species, farther 
beyond the long auxiliary vein than the breadth of the wing. The 
-submarginal is not very much longer than the first posterior cell. 
The discal cell is rather short, and the posterior cells beyond it more 
than twice as long as it. The great cross vein strikes the discal 
cell close to the base of the latter. The costal margin of the wing 
is very thick and deeply colored ; the wing itself is hyaline, with 
scarcely even a fuliginous tint at the stigma. The legs are slender, 
the femora gradually thickening toward the tip. 
Length of wings, 12 mm.: fore femora, 8.25 mm. ; tibiz, 9.75 
mm.; tarsi, 9 mm.; mid femora, 9.5 mm,; tibie, 9.25 mm. ; 
hind femora, 9.5 mm. 
One cannot but be struck by the close general resemblance 
of this species to the much smaller Zzmnocema lutescens from the 
same beds, a species with a marginal cross vein. 
Florissant, Colorado. One specimen, No. 10490. 
Rhamphidia feecaria. 
Tel, a Hans 
The auxiliary vein ends midway between the origin of the second 
and third longitudinal veins, the subcostal cross vein at its very tip. 
The preefurca arises at the middle of the wing, is gently arcuate and 
slightly declivent and distinctly more than half as long as the re- 
mainder of the vein. The first longitudinal vein ends as far from 
the origin of the third as that is from the origin of the second 
