Rau — Copulation, Oviposition in Samia Cecropia Linn. 313 

 II. Observations on Oviposition. 



1. NUMBER OF EGGS DEPOSITED. 



(a) Fertilized Females. 



The following table shows the number of eggs depos- 

 ited by each of 52 fertilized females: 



It will be seen that the number of eggs varies from 

 103 to 476, while the average is a fraction over 300. In 

 comparing these numbers with those of the previous year^ 

 we find in this season's count a greater range of varia- 

 tion, while the average is greater by 37. 



(b) Unfertilized Females. 



Following is the number of eggs deposited by each of 

 the 19 unfertilized females: 



Thus the numbers range from 73 to 422, averaging 

 237. This is greater than the average for 1909 by about 

 80, but being based on a larger series of material, is 



more significant. 



