204 
beyond the middle of the wing. The position of the marginal 
cross vein, being beyond the break, cannot be determined, and it 
is therefore possible that this species does not belong in this genus 
at all. The submarginal is but very little longer than the first pos- 
terior cell. The discal cell must be of excessive length if it is not 
Open, as it cannot be seen on the fragment, which is supposed 
to include just about one half of the apical cellular area, that is, 
the region beyond the basal cells. The wing is perfectly clear 
except that faint signs of a stigma can be seen just beyond the tip 
of the auxiliary vein. 
Length of fragment of wing, 8 mm. ; presumed length of wing, 
9-5 mm.; hind femora, 6 mm. ; tibiz, 6 25 mm. 
Florissant, Colorado. One specimen, No. 11389. 
Limnocema mortoni. 
Vl, 2p ive Is 
A single specimen with its reverse represents the smallest of the 
species of this genus. The outspread wings show a faint broadly 
diffused infumation in the region of the stigma, but are otherwise, 
and excepting the dark veins, hyaline. The auxiliary vein ends at 
a noticeable distance beyond the origin of the third longitudinal 
vein, and the subcostal cross vein lies directly over the latter, and so 
at considerably less than half way from the tip of the auxiliary 
vein to the origin of the preefurca. The latter arises somewhat 
before the middle of the wing, and the marginal cross vein is close 
before the tip of the first longitudinal vein, so that the marginal 
cell is very long, and its distal a little longer than its proximal 
portion. The submarginal is much longer than the first posterior 
cell,—indeed by as much as the length of the discal cell, which is 
here only about half as long again as broad, and considerably less 
than half as long as the slender posterior cells beyond it. A single 
femur is all that is preserved of the legs—a fore femur, to judge by 
its position, and in that case exceptionally long, being but little 
shorter than the wings. 
Length of wings, 7.9 mm. ; fore? femora, 6.25 mm. 
Named in memory of Dr. S. G. Morton, the distinguished Phil- 
adelphia naturalist of a past generation. 
Florissant, Colorado. One specimen, Nos. 8038 and 8215. 
