31'4 Trans, Acad. Sci. of St. Louis. 



(c) Comparison of otnposition in fertilized and unfertil- 

 ized females. 



The question whether the number of ova deposited be 

 equal in fertilized and unfertilized females is of some 

 interest. 



In 1909 I found the average number of eggs deposited 

 by the fertilized female to be the greater by 106. In 

 this season's work upon a larger series of material, I 

 found the same to be true by a difference of 63. Thus 

 the fertilized females oviposited more abundantly, in 

 spite of the fact that some of the time which a mated 

 female might have spent in ovipositing was spent in 

 long copulation. This shows that copulation, more than 

 the time available, influences completeness of oviposition. 



2. NUMBER OF EGGS RETAINED AFTER DEATH. 



(a) Fertilized Females. 



Below is given the number of eggs dissected from the 

 fertilized females after death. 



The number of eggs retained by the 52 insects varies 

 from in seven instances to 240, the average being 36. 

 This is less than the corresponding number for 1909 by 

 about 15. 



