202 
for example. The wings are a little less than four times as long as 
broad. The auxiliary vein is very long, terminating at or beyond 
the origin of the third longitudinal vein, and is connected at some 
distance before its tip with the first longitudinal vein by the 
subcostal cross vein. The second longitudinal vein arises well be- 
fore the middle of the wing, the prefurca but little declivent, so that 
the marginal cell is slender throughout and exceedingly long, since 
the marginal cross vein is situated at but little before the tip of the 
first longitudinal vein and scarcely at all affects the curvature either 
of that or of the second longitudinal vein. The single submar- 
ginal is considerably longer than the first posterior cell, and all the 
posterior cells, four in number, are long, the discal cell being closed 
and generally less than twice as long as broad. ‘The great cross 
vein strikes the discal cell slightly beyond the base of the latter. 
The legs are slender, the tips of the tibia unarmed. The abdomen 
appears to have been longitudinally striped. 
Four species occur, each of them at Florissant only; they may 
be separated by the following table: 
Table of the Stectes of Limnocema. 
Second longitudinal vein arising within the basal third of the wing. .warcescens. 
Second longitudinal vein arising beyond the basal third of the wing. 
Subcostal cross vein lying a long distance from the tip of the auxiliary vein. 
Preefurca arising before the middle of the wing; submarginal much 
longer thaniithe first posterion cella -esne eae ne erent lutescens. 
Preefurca arising at or beyond the middle of the wing; submarginal 
scarcely longer than the) frst posterior cells. = eee eeieiies SLX. 
Subcostal cross vein lying a short distance from the tip of the auxiliary vein. 
mortont. 
Limnocema marcescens. 
Pl. 2, fig. 7. 
This is the largest species of the genus, and remarkable for the 
excessive length of the marginal cell, which is more than half as 
long as the wing. The auxiliary vein ends just at the origin of the 
third longitudinal vein, but the subcostal cross vein cannot be made 
out. The second longitudinal vein arises distinctly within the basal 
third of the wing, and the marginal cross vein is so near its tip 
that the proximal and distal portions of the marginal cell are about 
equal. The discal cell is relatively small and narrower apically 
than at base, and the second and third posterior cells are slender 
