Mr. A. G. Butler on the Variation of Cyllo Leda. 51 length ; the first emitted at a short distance from the origin of the first subcostal branch, the second uniting with the median nervure at the origin of the second and third median nervules. Body. Thorax short, hairy ; head hairy ; antennae very slen-der, with scarcely perceptible club, about half the length of the front wings ; fore legs small, especially in male. Anadebis Himachala, PI. II. fig. 1. Theope {Mycalesis'i) Himachala, F. Moore, Cat. Lep. Mus. E. I. C. i. p. 234 (1857). Ethope Himachala, Moore, Proc. Zool. Soc. p. 770 (1865). Neorina Sita, Felder, Wien. ent. Monatsehr. iii. p. 403 (1859), Hab. Darjeeling (Moore). Sylhet. B.M. This genus must be placed next to Neorina of Westwood, from which it principally differs in the form of the antennae and the disco-cellular nervures. XIII. — Observations on the Variation o/ Cyllo Leda of Linmeus, a Species of Satyride Lepidopteron ; and on the different forms of that Insect in the National Collection. By Arthur G. Butler, F.Z.S., Assistant, Zoological Department, British Museum. Amongst all the exotic Butterflies, I have met with no species that exceeds Cyllo Leda in variation of form, pattern, and coloration. The common Diadema Lasinassa, though subject to great diversity of marking and ornamentation, diff'ers but little in the general outline of the wings ; of C. Leda, on the contrary, we find specimens in which the entire character of the insect is changed in consequence of the falcation or non-falca-tion of the apices of the front wings. This extraordinary variability has naturally had the efi'ect of adding considerably to the synonymy of this species : amongst other forms, C. Helena of Westwood and C. Banksia of Fabricius must be included. The synonymy of C. Leda will therefore be as under : — Papilio Leda, Linnaeus, Syst. Nat. ii. p. 773. n. 150 (1766). Oreas {marmorata) Leda, Hiibner, Saraml. exot. Schmett. Band i. pi. 91. f. 1-4 (1806-27). Hipio Leda, Ilubn. Verz. bek. Schmett. n. 538 (1816). Satyrus Leda, Godart, Enc. Meth. ix. p. 478. n. 4 (1819). Cyllo Leda, Westwood and Hewitson, Gen. Dium. Lepid. p. 361. n. 1 (1851). Papilio Solandra, Fabricius, Syst. Ent. p. 500 (1775). Cyllo Solandra, Boisduval, Voy. dans I'Oc^anie (de ' I'Astrolabe *), Ent. pt. 1. p. 142 (1832-35). Cyllo Helena, Westwood, Gen. Dium. Lepid. p. 361. n. 2 (1851). Papilio Banksia, Fabric. Syst. Ent. p. 499 (1775), 4*
XIII.—Observations on the variation of Cyllo Leda of Linnæus, a species of Satyride Lepidopteron; and on the different forms of that insect in the National Collection
BioStor
