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Show 1891.] BUTTERFLIES FROM EASTERN AFRICA. 189 shape, four on the disk and one above the second subcostal nervule : the basal area somewhat browner and followed by a broad oblique transverse band of yellowish white. Underside. Fore wing blackish, the transverse row of white ovate spots distinctly marked, but becoming obsolete towards the apex, where there is a distinct shade of ashy ; on the upper fore margin of the discoidal cell is an indistinct spot of white. Hind wing light brown, darkening towards the apex and across the disk ; the white spots not so distinct as on the upper surface, the middle one of the five being obsolete; between the second subcostal nervule and the radial nervule is an additional spot of white ; basal area rufous, with a spot and streak of black above the subcostal nervure ; the discoidal cell with three black lines; the rufous base followed by a white band not so distinct as on the upperside of the wing, and shaded with lilac under certain lights. Exp. 4 inches. Hab. Between Sotik and Kavirondo, Sept. 1889. The female is rather larger than the male, and is distinguished by the patch of rufous ochre which takes the place of the white transverse band of the male. There is a submarginal row of six white spots on the hind wing, instead of five as in the male. Instead of the band of longitudinal spots on the fore wing of the male, the female has a submarginal row of rounded white spots differing in size, five in number in a continuous series, confined to the disk, absent between the fourth and fifth subcostal nervules and between the latter and the first radial, but re-occurring between the third and fourth subcostal nervules near the apex. There are three irregular large white spots, one triangular on the upper margin of the discoidal cell, another below the cell, ovate in shape, between the first and second median nervules, and the third, a twin spot of irregular shape, at the base of the fifth subcostal and first radial nervules. Exp. 4 | inches. Hab. Kikuyu, Sept. 1889. This species is also nearly allied to P. echerioides of Trimen (cf. S. Afr. Butterrl. iii. p. 255), a species figured in the 'Transactions of the Entomological Society' for 1868 (p. 72, pi. vi. figs. 1, 2). The position of the white spots on both wings is quite different, and both spots and bands are white, not yellowish white as described by Dr. Trimen. Subfam. PIERIN^E. 3. M Y L O T H R I S W I N T O N I A N A , sp. n. (Plate X V I . fig. 2.) Female. Similar to the female M. clarissa of Butler, and with a yellowish hind wing as in that species, but with a very much broader blackish border. Fore wing white, the basal area pinkish; costal margin and an oblique patch on the apex blackish, with four triangular spots on the hind margin diminishing in size towards the posterior angle, the spot at the end of the submedian nervure being very minute, those |