EARLY CAPTURES ON DAMBA ISLE 257 



" I suggest that, in an area where these mimetic 

 patterns are less strongly selected, there is a tendency, 

 checked elsewhere, for them to run into each other, and 

 also to move in the direction of the western eurytus 

 forms, from which there can be little doubt that the 

 mimetic Pseudacraeas of Uganda originally developed. 

 It is to be hoped that Dr. Carpenter may be able to 

 obtain the material by breeding, as well as by capture, 

 by which this hypothesis will be confirmed or refuted." ^ 



The following table gives at a glance the forms and 

 varieties of eurytus, with their models, that were taken 

 on Damba : 



Models. 



Planema poggei . . 

 „ macariata 

 „ epaea paragea . 

 „ tellus ewnelia . 



Models 



16 



Mimetic fonna of eurytus. 



poggeoides . . . . — 1 



hobleyi 5 — 



tirikensis . . . . — 4 



obscura 2 1 



terra 6 9 



Mimics 28 



Intermediates . . 10 



Total eurytus . . 38 



It is seen that the mimics are almost twice as numerous 

 as the models, and there are in addition more than one- 

 third again of forms intermediate between the mimics. 

 The total number of Pseudacraeas is more than twice 

 that of the Planemas. Concerning these specimens Pro- 

 fessor Poulton wrote January 1, 1912 : ** I am most inter- 

 ested to hear that you did not distinguish the Planemas 

 and Pseudacraeas (I do not wonder at it) : it makes the 

 results more conclusive. There must be, I conclude and 

 argue in this little paper, something unfavourable to 

 Planemas in the conditions of Damba Islands ; and in 

 their absence or scarcity selection is damped down and 



^ Proc. Ent, Soc, 1911, p. xciv. 

 18 



