1891.] FROM SOUTH-WESTERN AFRICA. 71 



and reduced to two black lines (the inner one strongly festooned) 

 enclosing seven spots of the ground-colour which are much more 

 elongate than in A. acrita. Cilia white. Underside. — Hind wing 

 and apical area of fore wing yellowish creamy, hut duller than in 

 A. acrita ; and the former with little or no trace of internervular red 

 markings except near base between \st median nervule and inner 

 margin, lohile the latter bears a white space fainter than on upper- 

 side. Fore icing : ground-colour redder than in A. acrita. Hind 

 wing : spots more conspicuous than on upperside, none being obso- 

 lescent, arranged as in acrita, but all smaller ; hind-marginal 

 border as in A. acrita, but much narrower. 



$ . Like male ; but ground-colour slightly duller, black spots 

 proportionally larger and rounder (especially in liind wing) ; white 

 subapical space in fore wing larger and clearer (extending downward 

 to 2nd median nervule), and bases witli a moderate fuscous suffusion. 

 Hind icing : hind-marginal border rather wider than in male, its 

 black bounding lines somewhat thicker. Underside. — White 

 space in fore wing better expressed ; and internervular red markings 

 in hind wing as in A. acrita, tliongh much fainter. 



Ehanda (September) and Okavango River (December). One male 

 and one female specimen. 



I referred to this Acrcea, as a near ally of A. acrita, in ' South- 

 African Butterflies' (vol. iii. p. 382, note); and notwithstanding 

 the wide disj)arity of aspect effected by the broad apical black patch 

 and adjacent white space in the fore wings, the Butterfly stands so 

 near the species named that I am doubtful whether it can be kept 

 separate when more examples are forthcoming. Besides tiie two 

 specimens taken by Mr. Eriksson, I have received a fine male cap- 

 tured by Mr. F. C. Selous, in 1889, at a point a little S. of the 

 junction of the Chobe and Zambesi rivers; this agrees well with 

 Mr. Eriksson's Ehanda male, but has the black markings rather 

 stronger. The solitary female from the Okavango is probably a 

 dwarfed example, but in colouring it is much brighter than any 

 female of A. acrita that I have seen. 



The intimate relationship between this form and A. acrita is 

 further shown by a male Acrcea from Victoria Nyanza in the 

 British Museum, which, although without any white space in the 

 fore wings, presents in most of its markings an approach to the 

 peculiarities of A. amhigua. 



The antennae in this Acrcea and in A. acrita are remarkable for 

 their length, which is half that of the fore wings, and for their 

 elongate und gradual (instead of abrupt) elevation. 



11. Acr.«;a STENOBEA, Wallengr. 



Acrcea stenobea, Wallengr, Wien. ent. Monatsch. 1860, p. 35. 

 n. 9; Trimen, S.-Afr, Butt. i. p. 153. n. 44 [d ?], pi. 3. f. 2 

 [cJ](1887). 



Ehanda (August and September), Humbe (October), Otiembora 

 (November and December), Okavango River (December), Omar- 



