460 Dr. A. G. Butler A Revision 



taken as either a yellow variety or an intermediate type, and 

 T. evagore ( = saxeus) is the dry-season form. Practically 

 the whole of the forms are dry-season, but they represent the 

 seasonal phases which occur in more variable climates. That 

 T. evagore is the dry-season phase of T. Yerburii (and conse- 

 quently T. Heuglini of T. Thruppi, and T. nouna of T. daira) 

 is evident from the fact recorded (P. Z. S. 1896, p. 247) that 

 one pupa produced from a batch of larvae bred by Capt. Nurse 

 produced T. evagore * and all the others T. Yerburii. 



44. Teracolus Emim. 



J . Teracolus Emini, Butler, Ann. & Mag. Nat. Hist. ser. 6, vol. vii. 

 p. 47 (1891). 



Eanges from Abyssinia to the Albert Nyanza, thence 

 southwards through Nyasaland to Delagoa Bay, whilst we 

 have one male of the dry-season form from the Godman and 

 Salvin collection which is said to have been obtained as far 

 south as Graham's Town. 



But for the fact that the dry-season form of this species 

 exactly resembles that of the wet-season on the upper surface, 

 I should not have hesitated to regard it as an exaggerated 

 development of the closely allied T. eione. The latter, how- 

 ever, appears to be strictly confined to Southern Africa. 



45. Teracolus eione. 



Anthocharis eione, Boisduval, Sp. Gen. Lep. i. p. 578 (1836). 

 Teracolus galathinus, Butler, P. Z. S. 1876, p. 142. 



Kanges from the Cape to Delagoa Bay. 



The wet and intermediate forms of this species are much 

 alike on the upper surface, the latter, however, with ochra- 

 ceous apex to primaries and entire surface of secondaries 

 below, whilst the dry-season form is much more lightly 

 marked above, more rosy and irrorated with brown below ; 

 next to T. Emini it is the most heavily marked dry-season 

 form of its group, and notwithstanding its general resemblance 

 on the upper surface to the wet-season forms of T. phlege- 

 tonia, I do not consider that we have enough evidence to sink 

 it with its widely differing wet phase as a mere variation of 

 T. phlegetonia. When it can be proved (instead of asserted 

 without proof) that T. Emini, T. eione, T. antigone, T.xanthus, 

 T. interruptusj and T. glycera are only variations (unin- 

 fluenced by locality or climate) of one and the same species, 

 I shall be one of the first to accept the position. At present 

 I regard it as extremely improbable. 



* He calls it nouna, but that is a mere trifling misidentification. 



