Fig. 2. — Record of evolution on the wings of butterflies. 



1, a male, and 2, a female, of the Madagascar race of Pap/l/o dardanus, 

 3, a male, and 4, the commonest female form of the Uganda and "West 

 Coast race of the same species of butterfly. The model resembled by the 

 female and inhabiting the same area is very hke 5, but differs from it in 

 having a rather smaller white patch on the hind wing. The other female 

 forms of Papilio dardanus in Uganda and elsewhere mimic other unpalatable 

 models. 5, the model, Amauris niav'ius, and 6, the mimicking female 

 of Papilio dardanus, from southwestern Abyssinia. Both were taken, together 

 with three more of the model, by Mr. Arnold Hodson on November 15, 

 1925. Only four mimetic females, like 6, have been taken in Abyssinia, 

 the ordinary form of female being male-like and much resembling 2. The 

 left tail of the female shown in 6 has been torn off. 



The acquisition of the mimetic pattern in the Abyssinian race is so 

 recent that the females have not lost their tails, as they have in races in 

 other parts of Africa (compare 6 and 4). 



Photograph by Alfred Robinson. The figures are much below natural 

 size. 



