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Show 268 MR. H. J. ELWES ON BUTTERFLIES FROM [Apr. 21, ocelli occurs in Sikkim and when it would have been expected also in Burmah. This last form has no trace of a sexual patch or of transverse bands on the underside, and might be considered a form of Y. sakra as it was by Doherty, who wrote Y. nikcea on the paper, this name being considered both by de Niceville and myself as little more than a synonym of Y. sakra. It would appear from these specimens that although in Sikkim, whence we have much larger series taken at all seasons, Ypthima sakra, methora, and philomela are distinguished by fairly good characters, in East Pegu the same characters do not hold good; and that neither the sexual patch nor the striation or bands of the underside can be relied on to separate or name them. I hope, however, that by pointing out the difficulties which arise, collectors in different parts of Burmah may be led to take particular notice of the species of Ypthima, and if possible clear up the confusion which at present exists among them. YPTHIMA SAKRA. Yphthima sakra, Moore, Cat. E. I. C. i. p. 236; Butt. Ind. i. p. 232, t. xvii. 67 6 • Specimens of this, which agree well with those from Sikkim and the Khasias, were sent from the Naga Hills as well as from Bemardmyo. YPTHIMA PANDOCUS. Y. pandocus, Moore, Cat. E. I. C. i. p. 235 ; Butt. Ind. i. p. 223. Y. corticaria, Butl. Trans. Linn. Soc, 2nd ser. Zool. i. p. 537 (1879). Common at Perak in January and February. YPTHIMA NARASINGHA. (Plate XXVII. fig. 2, § .) Y. narasingha, Moore, Cat. E. I. C. i. p. 236 ; Butt. Ind. i. p. 225. Taken by Doherty at Bemardmyo in May. The female, which is undescribed, differs from the male in being larger, of a greyer tint above, and a more greenish shade on the underside. The striation of the underside is less marked than in Hewitson's type specimen. I doubt the occurrence of this species in Sikkim, wdiere it has never been found by any recent collector, and believe that this is the first time that it has been found since Hewitson described it. Doherty supposed it to be a new species of Callerebia, to which genus it seems to have as much or more resemblance than to Ypthima. ERITES MEDURA. Hipparchia medura, Horsf. Cat. E. I. C. pt. ii. t. v. figs. 8, 8 a (1829). ? Erites angularis, Moore, P. Z. S. 1878, p. 825 ; Butt. Ind. i. p. 236, t. xvi. 50 2 • Numerous specimens were sent by Doherty from East Pegu, taken |