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Show 66 MR. R. TRIMEN O N BUTTERFLIES [Jan. 20, as in A. atergatis, but considerably larger and crescentic ; costal hind-marginal black edging and basal streak and suffusion about as wide as in the acontias var. of A. atolmis. Hind wing : basal black as in Acontias, but no black on nervules, and position and arrangement of subbasal and discal series of spots like that in A. atergatis, except that in the discal series the 7th spot is considerably beyond the 6th; hind-marginal black edging about as wide as in A. acontias, but its inner side unequally indented by ground-colour on nervules. Cilia creamy white. UNDERSIDE.-Colouring much as in A. acontias, but duller as regards the ground-colour of fore wing and the basal and subbasal internervular markings of hind wing, which have scarcely any rose-pink tinge. Hind wing : nervules not black ; reddish-pink markings before discal series of spots, and submarginal internervular ochreous-orange rays, much reduced, fainter, in one example the latter almost obsolete ; black line preceding hind-marginal edging one regularly festooned throughout. 5 . Very like male; markings altogether similar-in one (the darkest) example all larger; ground-colour in one specimen paler, more inclined to salmon-pink, in the other two specimens a good deal duller, tinged with ochreous-brown. U N D E R S I D E . - H i n d wing and apical area of fore wing of a paler creamy-yellow ground-colour than in male ; reddish area of fore wing pinker than in male in the pale specimen, but duller in the brownish-tinged ones. In two of the males and in the darkest female there is a lougitudinal black suffused streak in the fore wing between the subbasal black spot and the 6th spot of the discal series, and in the latter example there is also a fuscous suffusion along the inner margin. This darkest female also presents on the penultimate abdominal segment a rather large laterally-winged horny appendage, which is wholly absent in the two other females 1. Humbe, Cunene River (October) ; Omrora (November) ; Otiem-bora (20th November to 3rd December); Okavango River (December). Four males and three females only were collected by Mr. Eriksson. Both sexes have the fore wings more rounded and less produced apically than is the case in A. atolmis and its variety acontias, and in comparison with A. atergatis this distinction is of course more marked. 7. ACRCEA AXINA, Westw. d1. Acrcea axina, Westw. App. Oates' ' Matabele-land, &c.' p. 344. ii. 33, pi. F. ff. 5, 0 (1881). d 2 . Acrcea doubledayi, Guer., var. B, Trimen, S.-Afr. Butt. i. p. 148 (1887). Omrora (August and November) and Okavango River (December). Five male and three female examples. On re-examination of the available material, in comparison with that supplied by Mr. Eriksson, I consider that species-rank may be 1 It is remarkable that not one of the sixteen females of A. atolmis and its variety, or of the six females of A. atergatis, possesses any traces of a similar appendage. More observations are much needed for ascertaining whether this appendage is congenital in the female Acrcece that exhibit it. |