FORMS FROM NYASALAND 249 



hind wings are pale yellowish, approaching those of such 

 a form as terra, to be described below. 



Another specimen in the Tring museum, from Fort 

 Anderson, Nyasaland, although it might be termed a 

 tirikensis, has a much larger area of white on the hind 

 wing, whereby it approaches to the East African form 

 rogersi, yet to be considered. 



Dr. S. A. Neave has discovered on Mount Mlanje in 

 Nyasaland a form of Planema aganice differing markedly 

 from the more southern Natal form by the greater size 

 of the pale areas on all wings in both male and female. 

 It is copied closely by a corresponding form of Pseudacraea 

 showing the same differences from the Natal form,^ 

 which is most interesting, for the shape and size of the 

 subapical white bar on the fore wing in the female comes 

 near to the form of tirikensis whose white transverse 

 bar is suppressed at the posterior end, while on the hind 

 wing the white area is as in the female form rogersi of 

 East Africa, At the base of the hind wing beneath 

 there is a large brown aposematic patch, which is exactly 

 intermediate between the long narrow purplish brown 

 patch of the southern imitator and the more triangular, 

 umber-brown patch of tirikensis. 



This new form in Nyasaland is thus beautifully tran- 

 sitional between the more northern and the eastern forms 

 tirikensis and rogersi and the more southern imitator, 

 and agrees as closely with its local model form of Planema 

 as do other Pseudacraeas already mentioned. 



At the time when hohleyi and tirikensis were looked 

 on as male and female of a distinct species of Pseudacraea, 

 a very interesting form was described by Poulton in 

 his paper on the Wiggins collection ^ as a " female pos- 

 sessing the colour and to a large extent the pattern 

 of the male." That is to say, it has an angular orange 

 bar crossing the fore wing, but the direction and shape 



1 Plate II, figs. 5-8. 



2 lere Congr^s International d'Entomologie, Bruxelles, Ao<it, 1910. 



