124 



ELIZABETH RAWLS. 



From 25 females mated with wild males 



i showed a ratio of 3 : i 

 10 showed a ratio of 2 : i 

 14 showed a ratio of i : i 



The exact figures are : 



TABLE XII. 



The results of these last generations seem to indicate that the 

 unusual sex ratio is gradually disappearing, to judge from the 

 number of individuals that inherit it, but whether it can be 

 maintained by breeding from certain strains remains to be 

 determined. 



