66 MR. R. TRIMEN ON BUTTERFLIES [Jan. 20, 



as in A. ateryatis, but considerably larger and crescentic ; costal and 

 hind-marginal black edging and basal streak and suffusion about as 

 wide as in the acontias var. of A, atolmis. Hind wing : bas^al black as 

 in Acontias, but no black on nervules, and position ai\d arraugenieiit 

 of subbasal and discal series of spots like that in A. ateryatis, except 

 that in the discal series the 7th spot is considerably beyond the 6th ; 

 bind- marginal black edging about as wide as in A. acontias, but its 

 inner side unequally indented by yround-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 winy: 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. 



2. 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. Underside. — Hind 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 longitudinal 

 black suffused streak in the fore wing between the subbasal black 

 spot and the (jth 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 ^ 



Humbe, Cunene River (October) ; Omrora (November) ; Oiiem- 

 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. ateryatis this distinction is of course more 

 marked. 



7. AcR^A AxiNA, Westw. 



c? . Acrcea axina, Westw. App. Oates' ' Matabele-land, &c.' 

 p. 344. n. 33, pi. F. ff. 5, 6 (1881). 



cJ 5 • 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 



' It is remai'kable that not one of the sixteen females of A. atolmis and its 

 variety, or of tlie six females of A. ateryatis, possesses any traces of a similar 

 appendage. More observations are niiicb needed for ascertaining whether 

 this appendage is congenital in the female Acraa that exhibit it. 



