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10 border is slightly angulated at the tip of the middle median nervulc, and (still more strongly at the tip of the lowest median nervule, causing in the latter a very broad angular projection, beyond which the margin slopes off and is rounded at the angle. The inner margin has a very broad and extensive basal projection, and the course of the internal nervure renders it probable that it was even more extensive than represented in the plate; it reaches more than half-way along the inner border, and at the broadest exceeds the cell in width; beyond it the inner margin has a nearly straight course, parallel and adjacent to the sub-median nervure.

As to the neuration (Pl. I, fig. 9) this genus approaches more closely the genera Zophoessa (Pl II, fig. 1), Neorina (Pl II, fig. 8), Debis (Pl II, fig. 10), and Lethe (PL II, fig. 6), than any others, although it differs from any of them more than they do among themselves. The most noticeable marks of distinction are these: in the fossil genus the first superior subcostal nervule of the fore wing is thrown off just at the extremity of the cell while the second and third are far beyond it; in the recent genera the first nervule is always emitted some distance before the tip of the cell and the second either at or before the extremity; in agreement with this, the cell is much shorter in Neorinopis than in the others, being but two-fifths the length of the wing, while in the others it is about one-half its length; in Neorinopis the nervule closing the cell of the fore wing unites with the median nervure at its last divarica-tion, while in the others it strikes it a long distance beyond. In the hind wing the vein closing the cell strikes the median at its last divarication, as in Zophoessa, while in the others it meets the last branch of that vein at a slight distance from its origin.

In the fore wings the costal nervure terminates at a little distance beyond the middle of the costal border. The subcostal terminates, as in the recent genera mentioned, near the tip of the wing, and has four superior and two inferior branches; the four superior ncrvules and the costal nervure terminate at nearly equal distances apart on (lie costal border; the first superior nervule is emitted from the very tip of the upper border of the cell, at two-fifths the distance