( 281 ) XIII. A 31onograph of the Genus Yphthima ; with Descrip-tions of two new Genera of Diurnal Lepidoptera. By W. C. Hewitson, F.L.S. [Read December 5th, 1864.] I HAVE myself experienced so much difficulty in determining the species of the genus Yphthima, as to believe that if I have success-fully worked it out, I shall have been of some use. It is an excellent genus ; I have neither admitted nor rejected any species about which I have the least doubt. Some of the new species are from the Collection of Mr. Wallace. The genus Ccenyra is nearly allied to Yphthima, as well as to Coenonympha; from both it differs in the neuration of the wings, from Ccenonympha in its very different palpi. Genus Ccenyra, Hewitson. Head small ; eyes small. Palpi long, straight, much com-pressed, thickly clothed with hair; the third joint long and nearly naked. Antennas slender, short, slightly and gradually thickened to the point. Anterior wing rounded ; costal margin arched, apex and outer margin rounded; inner margin nearly straight; costal nervure much swollen at the base, extending to the middle of the margin ; subcostal nervure with four equi-distant branches, two before the end of the cell ; discoidal cell half the length of the wing, the nervures which close it forming a regular curve inwards, the first obsolete, the second and third of equal length, joining the third branch of the median nervure at a distance from its base. Posterior wing very round ; the costal nervure reaching a little beyond the middle of the margin ; the subcostal branched before the end of the cell ; the disco-cellular nervules, which close the cell obliquely, are slightly curved inwards, the first being half as long as the second. Ccenyra Hebe. (PL XVII. figs. 1, 2.) Yphthima Hebe, Trimen, Tr. Ent. Soc. 3rd Ser. i. 280. Ccenyra Corycia, Hewitson. Alis rufo-brunneis ; anticis utrinque biocellatis ; posticis supra quatuor, subtus ocellis sex ; omnibus argenteo-pupillatis. Female. — Upperside pale brown ; both wings crossed by indis-VOL. II. THIRD SERIES, PART IV. — MARCH, 1865. Y
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