203 
and twice as long as the discal cell. The wings are uniformly 
and very slightly fuliginous, but no trace of stigma can be detected. 
The hind (or middle ?) femora are much shorter than the wings. 
Length of wings, 10.75 mm. ; hind (or mid?) femora, 8 mm. ; 
tibize, 9 mm. 
Florissant, Colorado. One specimen, No. 13069. 
Limnocema lutescens. 
el 2, pe. 
The auxiliary vein in this species ends a little way beyond the 
origin of the third longitudinal vein, and the subcostal cross vein is 
at a considerable distance before it, about half way to the origin of 
the przfurca, and at about the middle of the wing. The second 
longitudinal vein arises at some distance before the middle of the 
wing, and the marginal cross vein is at some distance before the 
tip of the second longitudinal vein, so that the distal is but slightly 
longer than the proximal portion of the marginal cell. In neither 
of the known specimens are the parts about the discal cell well pre- 
served, but the posterior cells can be seen to be very long, and the 
submarginal to be much longer than the first posterior cell. One 
of the specimens shows a slight infumation in the position of the 
stigma. 
This species bears a close general resemblance to the larger Rham- 
phidia saxetana from the same beds, which lacks any marginal cross 
vein. 
Length of wings, 8.2-9.5 mm. ; fore femora of larger specimen, 
5-75 mm. ; tibiz, 6.75 mm.; mid femora of smaller specimen, 
5-5 mm. ; tibiz 5.75 mm. 
Florissant, Colorado. ‘Two specimens, Nos. 603, 11817. 
Limnocema styx. 
Pl. 2, fig. 6. 
This species is very near the last, and the single specimen is im- 
perfect by the loss of the tip of the wing. It differs from the pre- 
ceding mainly in these points: The subcostal cross vein, though 
situated, as there, about midway between the tip of the auxiliary 
vein and the base of the przefurca, is very far beyond the middle of 
the wing, for the praefurca arises not far from and probably itself 
