68 MR. R. TRIMEN ON BUTTERFLIES [Jail. 20, 



enlarged spots of hind-marginal border very pale yellowish. Fore 

 iving : apical area somewhat tinged with orange-ochreous ; apical 

 and hind-marginal edging reduced to a very fine black line, immedi- 

 ately preceded by an interrupted thin streak of very pale yellowish ; 

 spots as on upperside. Hind wing : a general pinkisli suffusion, 

 stronger near base, fades into very pale yellowish a little before hind- 

 marginal border ; basal pale yellowish patch marked by five very 

 conspicuous black spots, viz. two (cellular and infia-cellular) close 

 to base, and three (the 2nd, 3rd, and 4th of a strongly curved, almost 

 continuous series of four) subbasal ; 6th and 7th spots of discal series 

 more distinct than on upperside ; pale spots of hind-marginal border 

 sharply defined and very conspicuous. 



2 . Paler, duller (in one of the two examples not reddish) ; fore 

 wing with a brownish tinge throughout, and with a wide basal fuscous 

 shade ; hind wing with basal blackish not so dark, but extending to 

 costa and to subbasal crescentic cellular spot ; markings as in male. 

 Underside. — As in male, but in the duller specimen much fainter 

 in tint, and in the brighter one with the pale yellowish preceding 

 hind-marginal border of hind wing wider. No abdominal appendage 

 in the brighter specimen, but a singularly large one in the duller 

 specimen, with such strong anteriorly-recurved lateral expansions 

 as to resemble a short, very broad, partly unrolled haustellum of 

 Acherontia. 



In addition to the various distinctions from A. axina mentioned 

 in the foregoing description, A. onerata in both sexes differs in its 

 smaller size, less produced fore wings, and (more especially in the 

 male) mvich shorter and blunter abdomen ; the small spot on costa 

 at base is also wanting in both fore and hind wings ; and the inter- 

 nervular subapical fuscous strise are absent in the fore wings. 



The male A. onerata also wants the basal fuscous clouding of 

 the fore wings and the white terminal half of the abdomen — both 

 conspicuous features in the male A. axina. 



Okavango River (December). Three examples : a male and two 

 females. 



9. AcR^A ASEMA, Hewits. (Plate VIII. figs. 9 c?, 10, lOa? .) 



Acrcea asema, Hewits. Ent. M. Mag. xiv. p. 52 (1877). 



Omrora (August), Ehanda (August and September), Humbe 

 (October), and Otiemboia (20th November to 3rd December). 

 Twelve male and seven female examples. 



As the late Mr. Hewitson {loc. cit.) did not suflaciently describe 

 this species, and as the butterfly seems to be still scarce in collec- 

 tions, I think it well to give the following description of both 

 sexes : — 



Exp. al.{<S)\ in. 94 lin. to 2 in. 1 k lin. ';(?)! i"- 9 lin- to 2 in. 



cJ . Yellow-ochreous (without any red tinge), with small black 



spots ; bases conspicuously but not very broadly suffused with black; 



hind-marginal black border linear in fore wing (except at apex), but 



' Of two dwarfed males, one (from Humbe) expands no more than 1 in. 

 7-s lin., and another (from Otiembora) only 1 in. 5 lin. 



