1898.] FROM BRITISH BAST AFRICA. 42") 



Samburu, 7th, 8th, & 16th November ; Tarn, 22nd November 

 & 20th December, 1896. 

 This abundant species seems to be almost cosmopolitan. 



165. ElSOBA OBSTRTTCTA. 



Risoba obstructa, Moore, P. Z. S. 1881, p. 328 ; Lep. Ceylon, iii. 

 p. 2, pi. cxliv. figs. 2, 2 a, 2 b (1884). 

 Samburu, 2nd November, 1896. 

 This is quite new to the African fauna. 



166. GONITIS SABULIFERA. 



Gonitis sabulifera, Guene'e, Noct. ii. p. 404 (1852). 



Mgana, 30th August; Samburu, 31st October, 4th & 7th 

 November ; Taru, 24th, 27th, & 28th November, 9th December, 

 1896. 



Many of the specimens belong to the variety named by 

 Walker G. involuta. The species is new to us from East Africa, 

 though we have it both from Abyssinia and Natal. 



167. MARASMALUS DISCISTRIGA. 



Eutdia discitriga (sic), Walker, Cat. Lep. Het. xxxiii. p. 823 

 (1865). 



Samburu, 4th November ; Taru, 1st December, 1896. 



I have never previously seen this species from Eastern Africa, 

 but we have it from Aden, and therefore it probably is to be found 

 in the extreme North. 



168. ZETHES BETTONI, sp. n. 



Closely allied to Z. Tiesperioides, having exactly the same outline, 

 structure, and nearly the same pattern ; it is, however, distinctly 

 smaller; the peculiar hatchet-shaped central belt across the 

 primaries is pale buffish, flesh-tinted or greyish, with the borders 

 of the lower half very black in fresh specimens ; the pale costal 

 dots are sometimes much whiter than in the species from Java and 

 Burma, and the subquadrate costal patch towards apex paler and 

 therefore less prominent ; the submarginal line on all the wings is 

 whitish with dark brown borders ; on the under surface the 

 resemblance to Z. hesperioides is again very great, but the basal 

 area is paler, the narrow dark-bordered transverse central band 

 usually paler, sometimes quite white, the discal belt sometimes 

 much darker than in any specimens of the larger species. Expanse 

 of wings, 3 31-32 millim., $ 29-32 millim. 



Taru, 1st, 6th, & 9th December, 1896. 



169. EGNASIA VIOARIA. 



Thyridospila vicaria, Walker, Cat. Lep. Het. xxxv. p. 1972 

 (1866). 



Mgana, 1st August, 1896. 



[31] 



