466 Dr. A. G. Butler -4 Revision 



heavily black-veined below, a character extremely rare in 

 T. isaura. 



57. Teracolus isaura. 



Anthocharis isaura, Lucas, Rev. et Mag. de Zool. p. 424 (1852). 

 Teracolus helle, Butler, P. Z. S. 1876, p. 149. 



North Africa, from Upper Egypt to the White Nile and 

 Abyssinia. 



This species, regarded as a whole, is smaller and less 

 heavily black-bordered than T. Garteri the wet-season form 

 has the veins below tipped with black, bat it is most unusual 

 even for the female to have them wholly blackened ; the 

 orange apical patch on the under surface of the primaries is 

 much smaller and more diffused, and the orange markings on 

 the secondaries are usually weaker. Both types belong to 

 the wet-season phase, from which the intermediate form only 

 differs in its more feeble black bordering, and on the under- 

 side in the less pronounced black tips to the veins ; the dry 

 form is still more weakly marked, without any black tips to 

 the veins in the male, the female below being suffused with 

 buffish salmon ; it is possible that the male may sometimes 

 have a rosy tinge below, but our examples do not show this 

 dry- season character (which is not invariable). 



58. Teracolus antevippe. 



Anthocharis antevippe, Boisduval, Sp. Ge"n. Le"p. i. p. 572 (1836). 

 Anthocharis zera, Lucas, Rev. et Mag. de Zool. p. 423 (1852). 

 Teracolus subvenosus, Butler, Ann. & Mag. Nat. Hist. ser. 5, vol. xii. 

 p. 105 (1883). 



Ranges from Senegal (where it appears to be rare) across 

 the continent (to Abyssinia *, according to Lucas), south- 

 eastwards to the Albert Nyanza, the Victoria Nyanza, Kilima- 

 njaro, and thence still eastwards to Zanzibar. 



Although related to T. isaura^ this species appears to me 

 to hold its own ; it is much more variable than T. isaura^ 

 frequently showing a black internal stripe on the upper 

 surface of the primaries and an imperfect black inner edging 

 to the orange apical patch : the female in all its phases is 

 much more heavily marked with blackish basal clouding and 

 still blacker internal stripe on the primaries ; the borders and 

 subapical bar are also blacker than is usual in T. isaura^ and 

 the angular band on the secondaries more strongly defined ; 

 the veins on the under surface of the wings are either black 



* I believe, however, that Lucas confounded with it the males of 

 T. helle (the dry-season form of T. isaura). 



