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Show 76 MR. R. T R I M E N O N BUTTERFLIES [Jan. 20, This individual is smaller than the type, expanding only 2 in. lin. The ocellus on the superior half of the disk in the hind wings is relatively smaller, and there is a similar ocellus (only half the diameter of other) on the lower part of the disk between the first and second median nervules ; also in the fore wings there is a less conspicuous but quite similar small discal ocellus between the first and second median nervules. These additional ocelli occur also, though less distinctly, in a larger example from Chaponga on the Zambesi, and the fore-wing ocellus faintly appears in another from Mashuna-land, both taken by Mr. F. C. Selous. The characters noted approximate to those of the intimately allied P. nachtigalii, Dewitz (I. c. p. 194, t. xxv. f. 16), described from single specimen taken by Pogge in Angola (lat. 10° S.) ; but the underside agrees with that of the typical form, possessing a very well-marked median streak in the hind wings but wanting the three ocelli of the Angolan form. In the Hewitson Collection specimens of P. artaxia are also recorded from Lake Nyassa. Genus CRENIS, Boisd. 25. C R E N I S NATALENSIS, Boisd., var. (Plate IX. fig. 12 8.) Crenis natalensis, Boisd. App. Voy. Deleg. dans l'Afr. Aust. p. 592. n. 80(1847). 1 Crenis amazula, Mab., Grandid. Hist. Phys. etc. Madag. p. 153, pi. xvii. ff. 9, 10(1885-87). Omrora (November) and Okavango River (December). Fourteen male examples. These specimens are all distinguished by a very much paler ochreous-yellow upperside, and a very much paler hlacine-greyish underside of the hind wings and apex of the fore wings, than are found in the male G. natalensis ; but still more remarkable is the fact that, although very faintly shown, the darker aud paler marking of the apical area of the upperside of the fore wings is that proper to the female (not to the male) C. natulensis. Indeed, these unquestionable males from tropical S.W. Africa look very much like the female C. amazula figured by Mabille '. They differ, however, in having the basal half of the wings much yellower (almost free from any darker clouding), and the costal-apical dark markings of the fore wing much fainter and less developed ; on the underside the latter distinction is also noticeable, but all the small black markings on this surface are more developed (especially the subbasal ones in the hind wings), and the yellow stripes bordering the ocelli of the hind wings are much deeper in colour and more strongly marked. These differences are all of course more marked in com- 1 M. Mabille himself remarks (I. c.) that C. amazula may perhaps be only a form of C. natalensis. He adds that he had adopted the name (amazula) given in Boisduval's collection to a specimen from the. "Cote dAfrique," that the form is rare in Madagascar, and that he had seen only two examples in the Paris Museum. |