219 
Named in memory of Prof. H. D. Rogers, formerly state 
geologist of Pennsylvania. 
Florissant, Colorado. One specimen, No. 13732. 
Limnophila vasta. 
: Agios. 
Wings very faintly infumated, with a faint and small fuscous 
stigma. Auxiliary vein ending opposite the base of the first sub- 
marginal cell. First longitudinal vein continuing far toward the 
apex of the wing, being apically deflected with the margin. Pre- 
furca arising at a little distance before the middle of the wing, con- 
siderably arcuate at base, beyond straight and gently divergent from 
the first longitudinal vein, as long as the end of the vein beyond 
the marginal cross vein, which is a little beyond the tip of the aux- 
iliary vein and oblique. First submarginal cell with a supernu- 
merary cross vein in the middle of its apical half. Four posterior 
cells. Diseal cell short relative to the posterior cells beyond it, 
which are very long. ‘The specimen is a male, and the antennz 
are very long as in the subgenus Idioptera, but whether there is a 
supernumerary cross vein in the second basal cell cannot be deter- 
mined. The legs are not preserved. It is the largest of the fossil 
species. ; 
Length of wings, 11.75 mm. 
Florissant, Colorado. One specimen, No. 7o21. 
Limnophila strigosa. 
Ble; figs 5: 
Wings uniformly and very faintly infumated, with no sign of a 
stigma. Auxiliary vein long, extending slightly beyond the base of 
the preefurca and the apex of the wing, the subcostal cross vein at 
its tip. First longitudinal vein extending far toward the tip of the 
wing, but scarcely declivent apically. Preefurca arising a little 
before the middle of the wing, gently arcuate throughout, two 
thirds as long as the first submarginal cell. Marginal cross vein as 
far beyond the base of the first submarginal cell as that from 
the origin of the third longitudinal vein, oblique. First submar- 
ginal cell with a supernumerary cross vein near its apex. Five pos- 
terior cells, the second petiolate, apparently longer than its petiole. 
The discal cell and parts below obscured by the folding of 
