504 Dr. A. G. Butler—^ Revision 



We have a very fine series of wet-, intermediate, and dry- 

 season examples of tliis species. T. aurigineus represents the 

 wet and T. venustus the dry phase. 



Race? Teracolus Ansorgei, 

 Teracohis Ansorgei, Marshall, P. Z. S. 1897, p. 13. 



Somaliland. 



Chiefly differs from T. aurigineus in the absence of the 

 ashy whitish base to the primaries of the male ; but, i£ 

 examples from Gallaland are referable to the same species, 

 this character must be variable. 



91. Teracolus DouhJedayi. 



Idmais Douhledayi, HopfFer, Peters's Reise n. Mossamb., Zool. v. p. 363 



(1862). 

 Idmais Hetoitsoni, Kirby, Cat. Diurn. Lep. p. 498 (1871). 

 Idmais chrysonome, Doubleday and Hewitson (not King), Gen. Diurn. 



Lep. pi. vii. fig. 5 (1847). 



Congo, Angola. 



The dry-season form is small and suffused with vinous 

 over the darker markings of the under surface, the bands 

 across the secondaries being vinous brown instead of golden 

 orange or cadmium-yellow. 



92. Teracolus rJiodesinus. 

 Teracolus rJiodesinus, Butler, P. Z. S. 1893, p. 663. 



Lake ]\Iweru, Central Africa 



I have only seen the type of this species (a wet-season 

 male), but it is so markedly distinct from the allied T. mutans 

 that I cannot for a moment entertain the notion of its being a 

 form of that species. It differs not only in the slender discal 

 band across the upper surface (which is partly obliterated), 

 but in the creamy ochreous tint of the upper surface extending 

 inwards almost to the base of the secondaries, in the paler 

 sulplmr tint of the apex of primaries and the secondaries on 

 the under surface, as also in the strongly defined and more 

 parallel inner angular band across the latter wings. In some 

 of these characters it more nearly approaches T. aurigineus. 



Mr. Marshall asserts that this butterfly combines the 

 characters of T. Hanningtoni and mutansl I fail to see 

 where T. Hanningtoni comes in. 



