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Show 1891.] FROM S O U T H - W E S T E R N AFRICA. 67 accorded to A. axina, Westw., as the great difference in size and absence of the two submarginal spots near the posterior angle of the fore wings appear to be constant over a wide stretch of territory, from Omrora as far eastward as Mashuna-land, and south-eastward to the Limpopo and Marico rivers on the N.W. boundary of the Transvaal. The males captured by Mr. Eriksson agree in their deeper colouring and less transparency much more closely with the description and figures of the two type-specimens from Tati and Gwailo rivers, than they do with the other eastern specimens taken by Mr. Selous at the Shashani River (between those two localities) and at several stations to the soutb of Tati as far as the Marico. Singularly enough, on the other hand, a Damara-land male, collected by Mr. John A. Bell, closely resembles the paler and more diaphanous examples received from Mr. Selous. The females in Mr. Eriksson's collection are also more warmly coloured and usually larger than the eastern examples, and in them the subapical bar is not white or whitish, but only of a paler tint than the ground-colour. In both sexes, Mr. Eriksson's specimens exhibit much more fuscous basal clouding than any other examples that I have seen ; and in this and in their other peculiarities are further from A. doubledayi. Exp. al.(S)\ in. 8-11 lin. ; ( ? ) 1 in. 8-10 lin. The females are not only smaller (as usual in this group of Acrcea), but have a tendency to a dwarfed condition; two of Mr. Selous' specimens expanding only 1 in. 7 lin., and another, as well as one brought from Damara-land by Mr. Bell, reaching an expanse of but 1 in. 6 lin. 8. ACR^A ONERATA, n. sp. (Plate VIII. figs. 7 6, 8, 8 a $ .) Allied to A. axina, Westw. Exp. al.(<S) 1 in. 8 lin.; ( ? ) 1 in. 8-8£ lin. S . Pale creamy reddish ochreous (a tinge of pink in hind wing), with moderate-sized black spots; hind wing with seven large spots of the ground-colour in rather wide black hind-marginal border. Fore wing : base very narrowly black ; a very narrow sublinear costal blackish edging from before middle, somewhat widening at apex ; a very narrow hind-marginal blackish edging, becoming finely linear below first median nervule, its inner edge somewhat dentated on the nervules, which are very finely black-marked in apical area and partly so (externally) below that area ; black spots in number and disposition as in axina, except that the lowest spot in discal series is minute, and, instead of being a little nearer base, lies considerably nearer hind margin than the spot immediately above it. Hind wing : basal blackish, darker than in axina, and scarcely rising above costal nervure ; subbasal cellular spot elongate, crescentic, separate from basal blackish ; no spot on upper discocellular nervule ; in very irregular discal series of spots the 1st, 5th, and 7th are rather remote from the rest, which are considerably beyond them, and of which the 6th is minute and obsolescent; spots in hind-maro- inal border very distinct, the first and last smaller than the rest and not rounded. U N D E R S I D E . - M u c h paler, of a softer and more creamy tint; in hind wing, an inferior basal patch and the |