( Ixxi ) 



and female waJilhergi, nothing but wahlbergi was to be ex- 

 pected, and yet Mr. Piatt's family contained 104 mima to 

 94 wahlbergi. If therefore the previous conclusions as to the 

 Mendelian constitution of the parents were correct, it was 

 clear that the female must have also paired at some earlier 

 date with a male mima. The emergences from the pupa, 

 which took place on the following dates, showed a pre- 

 dominance of males at the beginning of the series and a 

 predominance of females at the end : — 



The whole of these offspring had been set and were now in 

 the Hope Department with the exception of a male and two 

 females of each form, emerging Feb. 2, two pairs kept for 

 breeding and two females accidentally destroyed. 



Mr. E. E. Piatt had kindly written the following account 

 of the breeding experiment :- — 



" Durban, 



" March 24 and 30, 1914. 



" The parents were captured on the Blufi, which as you 

 will remember is a very well wooded locality across the Bay, 

 and bounded on the other side by the ocean. The Euralias 



