of the Genus Teracolus, Swains. 453, 
The yellow form of this species appears to be strictly con- 
fined to Kaffraria and Natal, but a somewhat paler race occurs 
in Matabeleland. The extreme types 7. auvo and ketskamma 
were proved by Mansel Weale and recently by Mr. Marshall 
to be wet- and dry-season forms of one species; J’. topha, 
which is usually regarded as identical with 7’ keiskamma, 
appears to me to be an intergrade of which we possess six 
examples in the Museum. 
Of the Matabele type, which only differs in its somewhat 
whiter coloration, we only possess males of the wet and 
intermediate forms. 
28. Teracolus dissociatus, sp. n. 
Allied to 7. auwxvo, but with whitish or white ground-colour, 
tinted along edge of apical area with sulphur-yellow. The 
wet-season form differs also from that of 7. auxo in that the 
male has a black oblique bar bounding the inner edge of the 
orange apical patch; the intermediate form * chiefly differs 
from J’. topha in its white colouring and the much more 
limited apical orange patch ; the dry-season form differs from 
T. keiskamma in its white colouring and much darker borders, 
but more especially in the females. In size this species 
agrees in all its forms with the more southern butterfly. 
Ranges from Nyasaland northward by Kilima-njaro to the 
Victoria Nyanza. 
29. Teracolus evarne. 
Pontia evarne, Klug, Symb. Phys. pl. vi. figs. 1-4 (1829). 
Pontia liagore, Klug, /. ¢. figs. 5-8 (1829). 
Teracolus citreus, Butler, P. Z. 8. 1876, p. 152. 
Teracolus vanthevarne, Butler, t. e. p. 165. 
Terucolus syrtinus, Butler, ¢. c. p. 168, 
One of the most widely distributed and variable species of 
its group, ranging from Upper Egypt and the White Nile to 
Abyssinia, southwards to the Albert Nyanza, the Victoria 
Nyanza, and Kilima-njaro, andeastwards to Mombasa. On the 
western side it appears to be rare, but we bave one example (the 
type of 7. syrtinus) said to be from “ Senegal” and a second 
recorded as simply from ‘* West Africa.” In ground-colour 
T. evarne varies trom primiose-yellow to white, the typical 
form being almost white with yellow diffused bordering to 
the orange apical area; this is the wet-season form of the 
species and the most heavily marked with black. 7. zanth- 
evarne appears to be the prevalent form of the species in 
* One of the supposed types of 7. syrtinus referred to by Messrs. Trimen 
and Marshall. 
