PREFACE XV 



pattern of the male are, as it were, let into the mimetic 

 female pattern, clearly proving that the two belonged 

 to the same species. The specimen, now m the Hope 

 Collection of the Oxford University Museum, is figured 

 in the Transactions of the Entomological Society for 1906 

 (PI. XVIII, Fig. 4). 



The evidence of this specimen was very satisfactory, 

 but how much better was the proof by breeding from a 

 known parent, obtained by the author in Bugalla island, 

 Sesse Archipelago, when he captured on December 1, 1912, 

 a planemoides female, and reared from its eggs three 

 females like the parent, seven of the black-and-white 

 hippocoon females, and twelve non-mimetic males. And 

 later on, m 1915, when Medical Officer to the forces acting 

 on the southern frontier of Uganda, he reared one plane- 

 moides female, one trophonissa female (similar to hippocoon, 

 but with the main white areas replaced by orange), and 

 five males from the eggs of a captured female combining 

 the patterns of her two daughters. These are the only 

 occasions on which the planemoides female has been bred, 

 although rare forms which evidently represent an imper- 

 fect planemoides, many hundreds of miles away from its 

 model, have been bred by Mr. C. F. M. Swynnerton in 

 S.E. Rhodesia, and by Mr. G. F. Leigh, in the neigh- 

 bourhood of Durban. 



The Pseudacraea mimics, belonging to the Nymphaline 

 sub-family, and allied to our own White Admiral {Limenitis 

 sybilla), illustrate the second great group of mimetic 

 butterflies in which the males resemble models as weU 

 as the females. The models of the Ps. eurytus series, 

 with which this book deals, all belong to the Acraeine 

 genus, Planema, but in some of them the sexes differ, 

 while in others they are alike. In Uganda there is one 

 common example of the first, mimicked by a Pseudacraea 

 whose male resembles the male and female the female, 



