462 Dr. A. G. Butler A Revision 



48. Teracolus xanthus. 



c? . Teracolus xanthus, Swinhoe, P. Z. S. 1884, p. 440, pi. xxxix. fig. 10. 

 Teracolus comptus, Butler, P. Z. S. 1888, p. 94. 



Teracolus bifasciatus, E. M. Sharpe, Ann. & Mag. Nat. Hist. ser. 6, 

 vol. v. p. 330 ; ?, Waterhouse, Aid, pi. clxxxix. (1890). 



Ranges from Upper Egypt southwards to the Victoria 

 Nyanza and Kilima-njaro, and thence to Nyasaland. 



This is a northern and eastern development of T. antigone, 

 usually smaller and more weakly marked on both surfaces, 

 especially in the wet-season form. Only the more heavily 

 marked examples of this form show any trace of the yellow- 

 basal suffusion on the under surface. At the same time it is 

 possible that where the two forms meet they may interbreed, 

 as is the case with some of the local races of birds. 



49. Teracolus metagone* 



Teracolus metagone, Holland, Proc. U.S. Nat. Mus. vol. xviii. p. 760 

 (1896). 



East Africa. 



This is a wet-season or intermediate form apparently nearly 

 approaching T. xanthus ^ var. bifasciatus ( = comptus) ; but 

 without examining either a good figure or a typical example 

 it would be rash to assert its identity with that species. It 

 must, however, be borne in mind that the internal fascia on 

 the primaries which occurs in the type specimens both of 

 T. bifasciatus and comptus and the small transverse spot near 

 the posterior extremity of the orange apical patch are not 

 constant characters, but grade away to nothing even in our 

 series. 



50. Teracolus interruptus. 



Teracolus interruptus, Butler, P. Z. S. 1871, p. 724 : Lep. Exot. p. 115, 



pi. xliii. figs. 1, 2 (1872). 



Teracolus lucullus, Butler, P. Z. S. 1876, p. 143, pi. vi. fig. 4. 

 Teracolus yelasinus, Butler, t. c. p. 143. 



Appears to be confined to Angola and the neighbourhood 

 of the Congo near its mouth. It is readily distinguished 

 from the more northerly West- African type T. antigone by 

 the absence of lemon-yellow at the base of the primaries 

 below in any of its phases ; the black internal bar is very 

 faintly indicated in the wet-season form and wanting in the 

 intermediate and dry forms. 



