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Show 904 MR. H. J. ELWES ON THE BUTTERFLIES [Nov. 15, and placed in a different genus by Moore in his recent paper on the genus. YPHTHIMA BALDUS, Fab. Syst. Ent. p. 323 (1793). ? Y. argus, Butl. Journ. Linn. Soc, Zool. ix. p. 56 (1866). I follow Dr. Staudinger in considering the common Amur species as Y. Baldus, Fab., though in such a genus it is difficult to be sure. I think there is little doubt that the Japanese Y. argus is identical with the Amur insect, though the underside, as a rule, is paler. It appears to be common in Japan. Y. MOTSCHULSKYI, Brem. & Grey, Schmett. nordl. China, p. 8 (1853). Satyrus motschulskyi, Men. Cat. Mus. Petr. t. vi. fig. 5. Distinguished from the last by having one ocellus on the upper-side of hind wing instead of two or three, and three on the underside, of which that at the anal angle is double. It is extremely near to, if not identical with, Y. nareda, Moore, from the N.W. Himalaya. Specimens referred to this latter species are in Dr. Staudinger's collection from Japan; and a Himalayan specimen referred to Y. motschulskyi is in the British Museum. It occurs also at Pekin ; and a very similar, though smaller form, is in Pryer's collection from Shanghai. ? Y. AMPHITHEA, Men. Schrenk's Reise, p. 41, t. iii. fig. 10. Nothing is known of this species except Menetries's figure and description, based on a single specimen from the Amur. I very much doubt whether it can be recognized in life. Y. ZODIA, Butl. Trans. Ent. Soc. 1871, p. 402. A small species with the underside of the hind wings very pale, and the ocelli reduced to mere points. It comes very near Y. methora from India, and is perhaps hardly separable. It is found in the Snowy Valley, hills of Ningpo, whence I have three specimens collected by Pryer. Y. evanescens, Butl. Ann. & Mag. Nat. Hist. ser. 5, vii. p. 134, from Nikko, Central Japan, seems to be a mere synonym of this-though, as it is described from a single specimen, it is impossible to say with certainty. It is described as resembling " Y. lisandra, Cr., above, and Y. zodia beneath ; the ocelli arranged as in Y. stellera." Y. MEGALOMMA, Butl. Cist. Ent. i. p. 236 (1874). This really does seem to be a good and distinct species, easily known from any I have seen by its shape and large ocelli. Discovered by Pryer on the Ningpo hills. PALTEONYMPHA OPALINA, Butl. Trans. Ent. Soc 1871, p. 404 ; Lep. Ex. p. 86, t. xxxiii. fig. 3. This genus appears to be peculiar to Central China. It was discovered by Pryer at the same time aud place as the last (see Ent. Month. Mag. 1877, p. 53), |