i6 



David Day JVhitney 



Punnett has pointed out that all the starved females of Nuss- 

 baum's experiments did not produce males, which invalidates his 

 general conclusions. 



Punnett has isolated female eggs of a "pure female strain, "and 

 after they hatched starved the young females from 2 to 20 hours 

 but no males ever appeared, although the young females were 

 starved for several consecutive generations. 



I have followed the history of many females which have been 

 starved for several hours immediately after hatching at a tempera- 

 ture ranging from 14° to 29° C. and have found no trace of 

 evidence that a higher percentage of male-laying females is pro- 

 duced. 



I Temperature 20° to 22° C. 



Experiment I. Sixty-two eggs were selected at random from 

 the sets of eggs produced by four female-laying females. They 



TABLE X 



Record of the sex character of the eggs laid 

 by 27 sisters, 15 of which were without food for 

 the first 6 to 26 hours after hatching and 12 

 were abundantly supplied with food from the 

 moment they hatched. 



Temperature 20 to 22° C. 



TABLE XI 

 Record of the sex character of the eggs laid 

 by 45 sisters, 1 1 of which were without food for 

 the first 21 to 26 hours after hatching and 34 

 were abundantly supplied with food from the 

 moment they hatched. 



Temperature 20 to 22° C. 



were placed in "Great Bear" spring water, such as is sold in New 

 York City for drinking purposes, and allowed to hatch. After 



