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Show 12 MR. GUY A. K. MARSHALL ON THE [Jan. 19, accord with ordinary seasonal variation l. Its range is similar to that of several of the Teracoli; its stronghold is on the eastern side of Africa, where it occurs from Abyssinia as far south as the North-west Transvaal, but in the Southern Tropic it continues westward to Damaraland. It does not seem to be anywhere very plentiful. 19. TERACOLUS PROTOMEDIA. Pontia protomedia, Klug, Symb. Phys., Ins. pl. viii. figs. 13 & 14 (1829). This handsome and distinct species seems to be wonderfully stable in its colouring. It ranges from Arabia, through Somaliland, Nubia, Dongola, and Equatorial East Africa to Madagascar. 20. TERACOLUS VESTA. Idmais vesta, Reiche, Fer. & Gal. Voy. Abys. pl. xxxi. figs. 7 & 8 (1849). Teracolus amelia, Lucas, Rev. Zool. p. 437 (1852). Teracolus velleda, Lucas, Rev. Zool. p. 428 (1852). Teracolus mutans, Butler, Ann. Mag. N . H . (4) xix. p. 459 (1877). Teracolus arglllaceus, Butler, Ann. Mag. N . H . (4) xix. p. 459 (1877). Teracolus hanlngtonll, Butler, Ann. Mag. N . H . (5) xii. p. 104 (1883). Teracolus catachrgsops, Butler, Ann. Mag. N . H . (6) ii. p. 178 (1888). Teracolus rhodesinus, Butler, Proc. Zool. Soc. p. 663 (1893). Teracolus blpartltus, Rothschild, Nov. Zool. p. 537 (1894). Although this species is fairly stable in South Africa, it exhibits many variations in the Central North Tropical areas, but a careful examination of them shows that they merge so graduallv into one another as to make it impossible to accord specific rank to any of them. T. mutans from Lake Nyasa and Njemps seems to m e quite inseparable from T. vesta ; and at the same time it varies so much in the direction of T. catachrgsops (Central East Africa), that the female type of that form might equally well stand as T. mutans. Again, theseries in Mr. Jackson's collection from East Africa shows the impossibility of separating T. hanlngtonll from T. catachrgsops ; and the more extreme specimens of this latter form merge ri^ht into T. amelia, Luc, from Abyssinia and Senegal. T. rhodesinus Butl., founded on a single male from Lake Mweru, combines the characters of T. hanlngtonll and mutans, and is probably an intermediate seasonal form. Judging from the description of T. blpartltus, Roths., I cannot distinguish it from a female of T. hanlngtonll, Butl., although the author associates it so closely with T. cclimene, Luc. T. arglllaceus, Butl., is the usual South- African dry-season form of the species. Owing, therefore, to the intricate interrelation of all the above i I have since seen the types of Mr. Trimen's Anthocharis phanon (= pholoe Wallgr.), and I a m satisfied that they are dry specimens of T. celimene with which opinion Mr. Trimen himself coincides. »mene, with |
