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 divarication, 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 nervules and the costal nervure terminate at nearly equal distances apart on the costal border; the first superior nervule is emitted from the very tip of the upper border of the cell, at two-fifths the distance from the base to the apex of the wing, the second beyond the cell, but scarcely beyond the middle of the wing; the third at a less distance from the base of the second than that is from the first, and directly below a point midway between the tip of the costal nervure and that of the first superior subcostal nervule; the fourth near the extremity of the wing and but little before the tip of the third superior nervule, or at about two-thirds the distance from the base of the third superior subcostal nervule to the tip of the subcostal nervure; the first inferior subcostal nervule originates of course at the tip of the cell, and separates but narrowly from the main stem, from which it diverges very gradually as far as the base of the outer superior nervule, where the main stem approaches it again; the lowermost inferior subcostal nervule arises from the first inferior scarcely beyond its base, curves inward, downward and then outward before taking a course parallel to the nervule above, from which it is separated at its base by twice the distance that the former is there distant from the subcostal nervure; the vein closing the cell can scarcely be called a vein, but rather a break in the membrane such as is often seen in recent butterflies, and is indicated in the fossil