466 Dr. A. G. Butler—A Revision 
heavily black-veined below, a character extremely rare in 
T. isaura. 
57. Teracolus tsaura. 
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 7’. Carteri; the wet-season form 
has the veins below tipped with black, but 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 
ihe 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. Gén. Lép. i. p. 572 (1856). 
Anthocharis zera, Lucas, Rev. et Mag. de Zool. p. 428 (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 7’. isaura, this species appears to me 
to hold its own; it is much more variable than 1. ¢saura, 
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 7. 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 7. tsaura). 
