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Show 1891.] FROM SOUTH-WESTERN AFRICA. 65 the var. acontias in 1875), and near which the late Mr. F. Oates also met with it at about the same date. Mr. F. C. Selous also took two typical males in 1889, at a point a little south of the junction of the Chobe and Zambesi. 5. ACRCEA ATERGATIS, Westw. $. Acrcea atergatis, Westw. A pp. Oates' ' Matabele-land, &c.' p. 342, pi. F. ff. 1, 2 (1881). Omrora (August) and Ehanda (26th August to 10th September). This species, of which nine males and six females were collected by Mr. Eriksson, is allied to A. atolmis (coming between that species aud A. doubledayi, Guer.) ; but the male exhibits none of the brilliant red tint, being but little brighter than the female, which is of about the same reddish ochreous as the least dull females of A. atolmis. The male has, however, a tinge of salmon-red, and is further distinguished from the female by larger size, longer fore wings (more produced apically), and longer abdomen, which is silky ochre-yellow, without black spots beneath, and conspicuously white laterally on its apical half (except on the terminal segment). Both sexes of A. atergatis, and especially unworn examples, present a singular distinguishing character on the underside of the hind wing and of the apex of the fore wing, viz., an ashy-grey-in very fresh examples a bluish-or violaceous-grey-somewhat shifting surface tint. The lunu-lated black line preceding the hind-marginal black edging-line on the underside of the hind wing is exceedingly unstable in both sexes, varying from complete development to a mere trace close to the apex. Exp. al. (6)1 in. 0|-2| lin.l; ( ? ) 1 in. 11 lin. to 2 in. 1 lin. As in the case of A. atolmis, the type of this species is a specimen collected near the Victoria Falls of the Zambesi by the late Mr. F. Oates ; and a male example taken by Mr. F. U. Barber about 30 miles south of the Falls was sent to me in 1875. In 1889 I received from Mr. F. C Selous two males captured at a point a little south of the junction of the Chobe and Zambesi. 6. AcRiEA FELINA, n. sp. (Plate VIII. figs. 5 6, 6 $ .) Nearly allied to A. atolmis and A. atergatis, Westw. Exp.al. (6) lin. 10i-ll| lin. ; ( ? ) lin. 11± lin. to 2 in.0|Un. S . Pale soft brick-red, with good-sized black spots and narrow black margins. Fore wing : nervules with black clouding as in atolmis and atergatis, but no apical internervular black stria as the latter species; spots in size and general arrangement as in acontias var. of atolmis, except that (1) the 4th spot of discal series is more beyond the 3rd and strongly crescentic; (2) the 6th spot is not so far beyond the 5th and more elongate; (3) the 7th spot (only faintly present in two specimens) is oblique, slender, and much nearer to base ; (4) the subbasal spot below median nervure is much larger and sagittate or strongly crescentic; and (5) near hind margin there are two additional spots, one on each side of first median nervule, 1 A dwarfed male from Ehanda expands only 1 in. % lines. P R O C ZOOL. Soc-1891, No. V. 5 |