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Show 414 MR. J. H. LEECH ON THE BUTTERFLIES [May 3, 48. THECLA BUTLERI. T. butleri, Fenton, P. Z. S. 1881, p. 853 ; Aid to Identif. of Ins. pl. 115. This is a very distinct species, the type is in Mr. Fenton's collection. The underside somewhat resembles T. enthea, Jans., but has dark bars and stripes in place of many of the spots ; there is a white submarginal band containing five black spots on the upper surface of the hind wing. Mr. Fenton records the capture of this species from the top of the Peak, Hakodate. 49. THECLA ENTHEA. T. enthea, Jans. Cist. Ent. ii. p. 157 (1877). I took some very much worn specimens of this insect in Yesso at the beginning of August; it is also reported from Nikko. It seems rare. 50. THECLA FRIVALDSKYI. Thecla frivaldskyi, Led. Verh. zool.-bot. Ges. Wien, 1855, p. 100. Lycana ferrea, Butl. Journ. Linn. Soc, Zool. ix. p. 57 (1866). Satsuma ferrea, Murray, Ent. Mon. Mag. xi. p. 168 (1874). Occurs all over Japan and in Gensan ; it is a very variable species, but I think it is identical with the Amur form. 51. POLYOMMATUS PHL^EAS, Linn. Var. eleus, Fab. Var. chinensis, Feld. Verh. zool.-bot. Ges. Wien, xii. p. 488 (1862). Common all over Japan and Corea. It is an extremely variable species both in size, colour, and markings ; during the summer the typical form gives way entirely to the var. eleus ; a few intermediate foims occur, and the specimens are darker in some localities than in others. The largest and darkest I found at Nagasaki iu July. 52. POLYOMMATUS AURATUS, nov. sp. (Plate XXXV. fig. 3, tf ?•) Expanse of wings, 3 If, $ 1| inch. Mule. Upper surface of all the wings bright golden copper, with narrow black outer margins ; fringes black, except on the inner margin of hind wings; on the outer margins of the hind wings are six black dots, the two nearest the anal angle being nearer together than the others. Female. Fore wings golden copper, much suffused with darker scales, margined broadly on the outer border with blaqk; two black discoidal spots, followed by a band of broad black dashes extending across the wing ; hind wing sooty black, bordered by a broad golden copper band notched at the edges. Underside of both sexes : fore wings yellowish buff, bordered on the outer margin with dirty grey, inside of which is a row of seven very |