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



9 a. Var. Papilio dubius. 

 Papilio dubius, Beauv. Ins. Afr. Am. p. 238, pi. vi. figs. 2 a, b (1805). 



? , Ngerenge Plains, W. coast of Lake Nyasa, Feb. 24th, 

 1895. 



" Black, white, and yellowish-brown Emperor " (R. G.). 



9b. $ vsLY.t=E. Drucei, but larger and with white central 

 area to hind wings. 



Ngerenge, Feb. 27th, 1895. 



9 c. $ var. = ^. mima, but smaller, and with partly white 

 central area to hind wings, as in E. Dracei. 



Ngerenge Plains, W. coast of Lake Nyasa, Feb. 24th, 

 1895. 



The four forms of Euralia here enumerated represent the 

 most interesting series hitherto received from Nyasa. 

 Mr. G. A. K. Marshall tells me that E. mima and E. Wahl- 

 bergi have not only been taken in copuld in S. Africa, but 

 have both been bred from a series of similar larvse taken from 

 the same tree ; yet not only are they wonderfully dissimilar 

 in pattern and colouring, but whereas E. Wahlbergi is repre- 

 sented by a Western form very like itself, E. mima does not 

 occur on the west coast. On the other hand, E. dubius is a 

 common Western type which varies considerably, but does 

 not occur in South Africa, whilst in Nyasa the whole of the 

 Western and Southern forms (with the exception of the 

 Western representative of E. Wahlbergi) occur together. 

 The whole question of the distinctness of species in this, as in 

 many other groups, becomes very complicated, more especially 

 when it is evident that the distinctions are not seasonal. 



10. Ilypolimnas misippus. 

 Papilio misippus, Linnseus, Mus. Lud. Ulr. p. 264 (1764). 



, Deep Bay, W. of Lake Nyasa, Jan. 1st, 1895 5 2 ? , 

 Mtambwi, foot of Nyika Plateau, Feb. 4th. 



The male is labelled " Purple Emperor," the females 

 " Black-veined and white and black Brown" and "Black- 

 veined Brown," the latter being the ff. inaria variety, 

 resembling Limn as Klugii. 



