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Show 1876.] MR. A. G. BUTLER ON THE GENUS TERACOLUS. 127 ber, until eventually we should be compelled to recognize but species in the genus, a consummation certainly not to be desired. At present nobody doubts the existence of numerous species. Kirby's Catalogue, which gives what is styled "the broad view," inasmuch as it allows almost unlimited latitude for variation, enumerates 14 species under ldmais, 4 under Teracolus, and 53 under Callosune, 71 in all*. It being, therefore, impossible to be certain, without careful breeding from the egg, of the limits of any species in this genus, I have taken the only course open to me, and have described all the forms which seemed, in both sexes, to present constant distinctive characters, or which differed sufficiently, as single specimens, to warrant the belief that they were not varieties of known species. 1. Wings sulphur-yellow or white, the apex of primaries dark, traversed in both sexes by pale spots : wings of male below nearly uniform in tint, sometimes with a few black spots, female more or less tinted with buff, the disk crossed by irregular series of dark spots. Teracolus, Swainson. 1 a. Wings of male uniformly yellow, apical patch of primaries internally ; apical spots confluent; wings below greenish white ; apex of primaries and secondaries reticulated with pale greyish brown. T. subfasciatus, Swainson. 1. TERACOLUS SUBFASCIATUS. Teracolus subfasciatus, Swainson, Zool. 111. Ins. ii. pl. 115(1823). * Anthocharis subfasciata, Boisduval, Sp. Gen. Lep. i. p. 567. n. (1836). Ptychopteryx bohemani, Wallengren, Lep. Rhop. Caffr. p. 18 (1857). Damara Land (Trimen). B.M. 1 b. A black streak on inner margin of primaries, broad in and uniting with a broad black outer marginal border. T. eris, Klug. 2. TERACOLUS ERIS. Pontia eris, Klug, Symb. Phys. pl. 6. figs. 15, 16 (1829). Pieris eris, Boisduval, Sp. Gen. Le'p. i. p. 514. n. Ill (1836). Anthocharis eris, Reiche, Ferret & Galinier, Voy. Abyss. Ent. p. 460, pl. 31. figs. 1-3 (1849). ldmais eris, Kirby, Syn. Cat. p. 499. n. 12 (1871). o* 2 > Ambriz (J. J. Monteiro) ; o* $, S. Africa (E. C. Buxton). B.M. The ground-colour of the wings of the female is either white, as in the male, or bright sulphur-yellow. * It should be observed that several species admitted in the above-mentioned Catalogue are referred by M r . Kirby to Pieris. |
