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Show 1885.] LEPIDOPTERA F R O M SOMALI-LAND. 767 PAPILIONID^E. 29. TERIAS ZOE. Terias zoe, Hopffer, Ber. Verh. Ak. Berl. 1855, p. 640, n. 5 ; Peters' Reise n. Mossamb., Zool. v. p. 369, pi. 23. figs. 10, 11 (1862). One male.-Thrupp. 30. TERACOLUS DYNAMENE. Pontia dynamene, Klug, Symb. Phys. pi. 6. figs. 15, 16 (1829). Var.? Teracolus carnifer, Butler, P.Z.S. 1876, p. 138, n. 42, pi. vii. figs. 8, 9. One male of each form.-Thrupp. M. Mabille has recently figured as the female of this species (which I am satisfied is not found in Madagascar) that sex of Staudinger's recently named Madagascar species T. castalis, placed by the latter author in the obsolete genus Ldmais. Dr. Staudinger is frequently at fault in his generic identifications, though most often his error consists in associating genera utterly different in structure, and whose chief resemblance is one of external facies (as is the case with Amynthia clorinde, described and figured in Dr. Staudinger's very pretty book as a Gonepteryx), whereas the three groups Ldmais. Callosune, and Teracolus, which, from insufficient material, Dr, Staudinger believes to be distinct genera, do not exhibit a single structural distinction, and, not only that, our collection of these butterflies, which is beyond all question by far the most perfect in the world, shows an almost complete transition, through numbers of nearly allied local forms, from the most Colias-like Ldmais-form to the extremest type of Callosune-form almost resembling a Leptidia. It is easy to figure selected species and to say that they are members of different genera ; it is just as easy to assert without evidence that intermediate forms have been described from single specimens and therefore may be ignored ; but facts remain as they were,-genera founded on good structural characters will alone stand. 31. TERACOLUS OCELLATUS, sp. n. d . Exactly intermediate between T. protractus and T. phisadia primaries only differing from the latter in the straight inner edge to the blue-grey basal area, which agrees with that of T. protractus, and in the distinctly white-pupilled black spot at the end of the cell; secondaries like T. protractus, excepting that the abdominal half from the base to the border is white as in T. phisadia: on the under surface the wings are almost exactly as in the latter species. Expanse of wings 39 millim. One male.- Thrupp. This is one of the most interesting species in the collection, since it is exactly intermediate between the salmon-coloured T. protractus and the salmon and white T. phisadia. I have long been looking out for this intergrade, as I was satisfied that it must exist; I have also no doubt that a species intermediate between T. phisadia and 50* |
