438 Dr. A. G, Butler on new African Pierinte. 



Belenois occidentis, sp. n. 



Allied to B. westwoodi, but distinctly larger, the apical area of the 

 primaries irrorated with grey, the outer border greyer than in 

 B. westwoodi, the irregular transverse subapical band interrupted 

 in the middle ; the veins blackened to the cell, excepting the first 

 two median branches ; the discocellular black bars continued round 

 the end of the cell as far as or beyond the emission of the second 

 median branch ; secondaries with a well-defined black discocellular 

 dash and several black traces of the'discal markings of the under sur- 

 face ; black marginal spots and fringe as usual. On the under surface 

 nearly the whole of the veins are brown, darker on the primaries ; 

 in the wet phase the primaries show a grey basal patch terminating 

 in a black discoidal streak ; the black discocellular bar is continued 

 broadly to the first median branch along which it runs to the 

 middle, so that it forms a large Z-shaped character ; in the dry 

 phase >the discocellular bar runs backward only half way to the 

 origin of the first median branch. In the character of the second- 

 aries this species is like B. westwoodi on the under surface. Expanse, 

 -64 millim. 



Hob. CONGO ; LOANDA (Mus. Brit.). 



These examples were received from the Godman and 

 Salvin collection, a male (wet phase) from the Congo, and 

 a pair (dry phase) from Loanda. There is very little 

 doubt that this is the species for which Boisduval pro- 

 posed his manuscript name of " Pier is allica" but M. 

 Oberthtir having published the name as applying to B. 

 abyssinica, it has become a synonym and cannot now be 

 resuscitated. 



