David Day Whitney 



Table II gives the summary of each generation and the final 

 summary of the twelve generations. 



In this experiment 95 mother-individuals produced 3264 daugh- 

 ter-females of which 20 + per cent were male-laying females. 



It will also be noted that the percentage of male-laying females 

 varied in the different generations from i + per cent to 48 +'per 

 cent regardless of the number of isolations in each generation. 



b Temperature 25° to 29° C. 

 Experiment II, October 26. Two female-laying females were 



TABLE in 



Record of the production of male-laying and female-laying females among the 208 daughter-females 

 of 26 female-laying mothers. 



Temperature 25° to 26° C. 



Temperature 26° to 2g° C. 



isolated from the same stock jar in a similar manner as in Experi- 

 ment I, and placed in an incubator. Two generations from one 



