246 PSEUDACRAEA EURYTUS 



in the first named form. Colonel Bowker, in a letter 

 to Trimen, said it was " quite impossible to distinguish 

 between this butterfly and aganice either when settled or 

 on the wing." (Plate II, figs. 9-12.) 



The male and female have the same pattern on a 

 black ground, the pattern being cream coloured in the 

 male, while in the female it may be either cream coloured 

 or white. The female may thus resemble either the 

 male or female of the model, which, so far as I am aware, 

 does not occur among other forms of eurytus, in which, 

 if the model is dimorphic, the male is copied by the male 

 of the mimic and the female by the female. The white 

 areas of the female differ quite noticeably in this form 

 from the pattern of the female eurytus, there being only 

 a trace of white, instead of a large, well defined area 

 on the inner margin of the fore wing. This species 

 possesses in a very high degree a most conspicuous aposeme 

 on the underside of the base of the hind wing which, 

 as in the model, must be of great value when the insect 

 is at complete rest with the wings brought together over 

 the back. This aposeme takes the form of a well defined 

 patch of bright purplish or reddish brown, extending 

 outwards from the base along the costal margin. 



The form imitator, southern in distribution, is con- 

 nected with the northern forms shortly to be described 

 by forms found in Nyasaland quite plentifully, and others 

 more rarely in East Africa. 



Very recently has been discovered a single specimen 

 of a most remarkably interesting form which extends 

 our knowledge of the distribution of Pseudacraea eurytus 

 south of Natal to West Pondoland. The specimen 

 referred to is in the museum at Tring, and I am greatly 

 indebted to Lord Rothschild and Dr. Karl Jordan for 

 the loan of it that I might compare it with others. It 

 was taken on April 16, 1915, by H. H. Swinny, at Port 

 St. John's, and is of quite a distinct reddish orange tint, 



