454 Dr. A. G. Butler — A Revision 



Upper Egypt, the White Nile, and Abyssinia, and chiefly 

 differs in its inferior size, yellower colouring, and frequently 

 in the larger orange patch on the primaries. T. syrtinus is 

 an intermediate- season form which apparently ranges west- 

 wards from Mombasa through the Sabaki valley, past Kilima- 

 njaro and the Victoria Nyanza to Wadelai, and thence across 

 the continent to Senegal, where it varies slightly from the 

 normal form, the lower extremity of the orange apical patch 

 being indistinctly bordered with blackish, so as vaguely to 

 resemble the wet-season form of T. aiixo (nobody, however, 

 with an eye lor species could calmly compare the two and 

 for a moment regard them as identical). The males of this 

 form never have the margin of the secondaries dotted, and on 

 the under surface they show a slight tendency to rosy tinting. 

 The females are altogether more lightly marked than those of 

 typical T. evarne. T. liagore is probably little more than a rare 

 starved albinism occurring in Egypt and on the borders of 

 the Red Sea ; in its weak markings it would seem to be 

 a dry-season form, but the colouring of the under surface 

 is that of the wet-season. I should look upon it as an inter- 

 mediate form probably occurring just before the rains. 

 T. citreus is the dry-season form occurring with typical 

 T. evarne^ but smaller, much more lightly marked above, and 

 very rosy below. 



30. Teracolus Phillipul. 

 Teracolus Phillipsi, Butler, P. Z. S. 1885, p. 772, pi. xlvii. tig. 11. 



Somaliland. 



This is a well-detined local representative of T. evarne most 

 nearly approaching the varietal form T. liagore in character. 

 In all its seasonal.phases it is much more lightly marked and 

 paler in colouring than T. evarne, as well as shghtly smaller 

 than in the corresponding phases of T. evarne. The ground- 

 colouring is always white, with the pale orange apical patch 

 very faintly tinted with yellow along the inner edge ; the 

 marginal bordering even of the wet-season male is compara- 

 tively weak, while the secondaries are always unspotted. 

 The female in the wet-season has the upper surface marked 

 almost as in the dry-season female of T. evarne, while the 

 intermediate type, which is much smaller, has the female 

 still less marked above and striated below with greyish olive ; 

 the dry-season form is very small, the male without marginal 

 markings, the female very faintly marked, but both sexes 

 rosy and more or less striated below. 



