74 Dr. A. G. Butler on Lepidoptera from Nyasa. 



in India the species produces two dry-season forms — B. ilithyia 

 and B. simplex*. But the question most difficult of explana- 

 tion, as it seems to me, is — How can two forms be called 

 seasonal when they occur at the same season ? 



22. Acrcea caldarena. 

 Acrcsa caldarena, Ilewitson, Ent. Month. Mag. xiv. p. 52 (1877). 



? , Henga, W. of Lake Nyasa, Feb. 1st, 1895. 

 " Black-tipped dusky Fritillary " (i?. C). 



23. Acrcea egina. 

 Fapilio egina, Cramer, Pap. Exot. i. pi. xxxix. figs. F, G (1776). 



Lumpi River, Lower Nyika, Feb. 2nd, 1895. 

 " Large rose and black Fritillary " (/?. C). 



24. Catopsilia florella. 

 $ . Fapilio florella, Fabricius, Syst. Ent. p. 479 (1775). 



(J ? , taken in coitH^ Mrali, March 2nd ; ? , Henga, 

 Jan. 22nd, 1895. 



" Yellow Brimstone " [R. C.) . 



Mr. Crawshay evidently supposed the bright-coloured sex 

 to be the male, and labelled accordingly ; in this, of course, 

 he was mistaken. 



Var. CoUas pyrene. 

 Colias pyrene, Swainson, Zool. 111. i. pi. li. (1820). 



(J ? , taken in coiiil, Mrali, March 2nd (the female con- 

 tained a " large number of white pointed eggs "). 

 " Green Brimstone " {R. C). 



25. Teracolus anax. 



Callosune anax, H. Grose Smith, Ann. & Mag. Nat. Hist. ser. 6, vol. iii. 

 p. 125 (1889) ; Rhop. Exot. i.. Call. pi. i. tigs. 5-8 (1889). 



? , Henga, 3200 feet, west of Lake Nyasa, Jan. 22nd, 

 1895. 



"Violet-tipped White ?" {R. C). 



2\ anax is said to be a wet-season form of T. regina. I 

 very much doubt the existence of T. regina in many of the 

 localities frequented by T. anax ; the latter flies in January, 



* Most of our examples of the latter, if not all, were captured in 

 February. I am told, however, that the seasonal forms in India are less 

 marked than in Africa. 



