10 FOSSIL BUTTERFLIES. 



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 pro- 

 jection, 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; be- 

 yond it the inner margin has a nearly straight course, parallel and adjacent 

 to the sub-median nervure. 



As to the neuration (PI. I, fig. 9) this genus approaches more closely the 

 genera Zophoessa (PL IT, 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 dis- 

 tinction 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 ]S"eori- 

 nopis 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 



