Papilio dardaimts {mcTOpc) and Acrxa johnstoni. oil 



colour there probably arose still more perfect mimics of 

 the same models in j^'^'otema and Jiavcscens, the two forms 

 of johnstoni which are nearest to fallctx. It is to be 

 observed that the change in the shape of the fore-wing 

 which occurred as fallax gave rise to johnstoni is in the 

 direction of the form of the Danaine aud Flanema models. 

 Johnstoni once formed, variation in other directions, guided 

 by natural selection, led to the mimicry of various 

 additional Danaine and Acraiine models : — of Limnas 

 clirysvppus, var. dorippus, of Planmia quadricolor, Planema 

 latifasciata, and Planema poggci. 



[My friend Mr. Guy A. K. Marshall has kindly read 

 through the proof-sheets of this paper, and has made 

 many valuable suggestions.] 



