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Show 20 MR. GUY A. K. MARSHALL ON THE [Jan. 19, 38. T E R A C O L U S PHLEGYAS. Anthocharis phlegyas, Butler, Proc. Zool. Soc. p. 431, pl. xxv. fig. 3 (1865). Euchloe jalone, Butler, Cist. Ent. i. p. 14 (1869). Teracolus buxtoni, Butler, Proc. Zool. Soc. p. 130 (1876). Teracolus Imperator, Butler, Proc. Zool. Soc. p. 132 (1876). Teracolus bacchus, Butler, Proc. Zool. Soc. p. 73 (1888). Teracolus lone, Reiche, Fer. & Gal. Voy. Abyss. (1849) ; Felder, Reise Nov. (1865); Trimen, S. Afr. Butt. iii. p. 101 (1889). Callosune mrogoroana, Vuillot, Bull. Soc. Ent. Fr. p. ci (1891). Callosune jalone, var. natalensis, Staudinger, Exot. Schmet. p. 44 (1885). The male type of this highly variable species is a dwarfed specimen from the White Nile, and its most distinctive character is that the underside of the hind wings is white with all the neuration finely blackened throughout. From Wadelai and Njeinps I have seen very similarly marked specimens, which are, however, of much larger size, being quite equal to the T. Imperator form. The only important difference between these examples and T. bacchus, Butl., which is recorded from Wadelai, Kandera, and the Sabaki Valley, is that the latter has the underside neuration very heavily blackened, which certainly gives it a very distinct appearance ; but the development of the black on neuration is such an eminently unreliable character in this genii3 that I cannot consider it a good species. T. mrogoroana from Zanguebar is identical with bacchus, the differences referred to by M . Vuillot appearing to m e to be absolutely trivial. T.phleggas also varies in the opposite direction, namely in the gradual loss of the black neuration below until the underside of the hind wing becomes pure white without any markings whatever. Such specimens, however, seem to be rare, as there is nearly always some trace of the oblique dusky discal ray from costa, which is so characteristic of the group. It was on a dry-season specimen of this variety that Mr. Butler founded his T. jalone, which has the underside of secondaries of a pinkish tinge with a faint discal ray. This again merges gradually into T. Imperator (Central East Africa) both in the development of the discal ray and in the tendency to assume a 6th spot in the purple descriptions by examination of the actual specimens from which they were made in the Paris Museum-gives Senegal only. As late as 1847 (App Voy Deleg. p. 587)-referring to the discovery of T. ione in Natal-Boisduval writes : " Avant ce voyage, cette espece etait fort rare dans les collections. Les quelques individus que l'on connaissait avaient ete recueillis en Abyssinie ou au Senegal " T. speciosus is by far the most strictly local of the known forms of purple-tumed Teracoli, and even in England does not seem to have been received before 1840; and it was not until 1857 that Wallengren described it as distinct from the recognized T ione On he whole 1 must still regard it as far more probable that in 1818 Godart had before him one of the widely-ranging tropical forms and most likely a Senegal specimen, than that he should have bien in possession' of a form peculiar to the Natal coast, where even the pioneer K J e a n elephant-hunters and traders did not go till 1825.-R. TRIMEN.] " ^ P ^U |
