508 Rev. K. St. Aubyn Rogers' Bionomic Notes on 



group is the female of Plancma aganice, Hew., form mon- 

 tana, Butler, which is found commonly in many localities 

 in East Africa. Associated with it are the white-marked 

 forms of the female of the common Acrwa eschria, Hew., 

 and of A. carmaitis, Doubl, which I have once received 

 from Kilimanjaro. I have also once taken the female of a 

 PseudacTcVa* probably the eastern representative of the 

 western P. hircc, Drury. This white-marked female is a 

 beautiful mimic of the female Plancma. These three 

 species are so similar in pattern and flight that I do not 

 think it is possible to distinguish them on the wing, They 

 all have the characteristic leisurely flight of the Aciwinx, 

 and, from their large size and strongTy contrasted black 

 and white colouring, are distinctly suggestive of the 

 Amavris niavius dominicaji^i s-centred combination. Other 

 mimetic resemblances of and between the males of these 

 two common Acrseas will be described on p. 523. They 

 are considered with the other Acnva-cenired combinations, 

 because the pattern of the males does not, like that of the 

 females, enter into a distant relationship with any of the 

 Amatms-centred associations. 



Another outlying member belonging to the same sub- 

 family is the female of Acr/ea satis, Ward, which I have 

 found not unfrequently in the Coast district, and even on 

 Mombasa island. Here acjain, althousjli the details of 

 marking are very different, in size and colour the 

 species certainly approaches this great black and white 

 combination. 



Picrinx. Professor Poulton has suggested that Gluto- 

 l^hrissa saha, Fab., ^, should be regarded as an outlying 

 member of the combination, but as far as my experience 

 goes this species is always an unmistakable Pierine, and 

 does not resemble the other members in its habits or 

 appearance.^ 



Papitionin/v. I am somewhat more doubtful as to the 

 position of Pajntio iJ^i^onoc, Ward, which certainly has a 

 floating flight. It bears more resemblance to Pscudacrxa 

 hicrctia expansa than to any other member of the com- 

 bination, but the white areas are much more extensive 

 and it can always be easily recognised. 



* Pseudacrcea rogersi, sp. nov. See Appendix, p. 549. 



t Mr. Roland Trimen suggested in 1881 (Proc. Ent. Soc. Lond., 

 p. vii) tliat the 9 saha might be a mimic of the widely-spread and 

 evidently protected Ai'rican Hypsid moth, Nyctemera apiculis, Walk. 



