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



approaching it within 200 miles, while its most eastern point (on 

 the Okavango) is distant from it more than 600 miles. 



Hitherto, except to some extent as regards Southern Damara- 

 land, the Rhopalocera of this territory have been very little known, 

 and it is thus of interest to place on record a complete list of the 

 species met with by Mr. Eriksson, with notes of any variation 

 observed in the case of species already described, and descriptions 

 of those forms which appear to he new to science. 



The collection, consisting entirely of pinned specimens, arrived in 

 excellent condition. I have found it, on careful examination, to 

 contain 125 species, thus distributed among the several families and 

 subfamilies, viz. : — Nymphalidse (Danainse 1, Satyrinse 2, Acrae- 

 inse 12, Nymphalinse 23), 38 ; Lycsenidse, 40 ; Papihonidse 

 (Pierinee 22, Papilioninse 4), 26 ; Hesperidse, 21. 



As was to be expected from its geographical position, and from 

 the absence of any intervening barrier of importance, this country 

 exhibits in its butterflies very intimate alliance with extra-tropical 

 Southern Africa, 97 (or nearly four-fifths) of the species being 

 common to both territories. Although the northernmost part of 

 the country collected in is adjacent to the most southern province 

 of Angola (Mossamedes), there seems to be community of species 

 to but a small extent, only 26 of Mr. Eriksson's species appearing 

 in Mr. Druce's list (Proc, Zool. Soc, 1875, p. 406) of Angolan 

 butterflies collected by the late Mr. J. J. Monteiro, and Dewitz (Nov. 

 Act. Leop. -Carol. Deutsch. Akad. 1879) giving but 32 of them among 

 those brought by Pogge from Central Angola. Tt is further very 

 noticeable that the characieristic tropical West-African genera 

 Elymnias, Ergolis, Qodartia, Euryphene, Eiiphcedra, Aterica, 

 Harma, Abisara, and Epitola, all of which have Angolan represen- 

 tatives, are entirely absent from Mr. Eriksson's collection. 



At the same time it must be remembered that the series brought 

 together by Mr. Eriksson contains the captures of only a single 

 half-year, and so cannot be looked upon as completely illustrating 

 what the country produces. In remarkable contrast to the Lycse- 

 nidae, which are the best represented group, the Satyrince and 

 Papilionince ?eem to be singularly few. 



Of the 28 species not known to occur in extra-tropical areas, 1 1 

 appear to be undescribed, viz. : — 



(Nymphalidee.) 

 (^AcrehicB.) 



Acrcea felina. 

 „ onerata. 

 „ ambigua. 



(Lycsenidse.) 



Deudorix obscuratus. 

 Aphncsus erihssoni. 

 ,, modestus. 

 Zeritis damarensis. 

 Erikssonia (n. g.) acrceina. 



