Rau — Copulation, Oviposition in Samia Cecropia Linn. 3 15 



(b) Unfertilized Females, 



The table shows the number of ova retained by the 

 unfertilized females. 



270 103 40 



257 102 37 



247 100 32 



189 85 31 



179 80 23 



144 68 21 



137 62 17 



135 53 2 



133 48 2 

 110 



The numbers varied from 2 to 270, averaging 96, which 

 accords well with the data for 1909. 



(c) Comparison of the Number of Ova Retained by 

 Mated and Unmated Females. 



The mated insects retained the smaller number of egg^ 

 after death. A glance at the numbers in the two tables 

 will at once make this clear, and the average for the 

 fertilized females was 36, against 96 for those unfertil- 

 ized. In the unmated insects I found none which ovi- 

 posited completely, while among those which were fer- 

 tilized seven oviposited perfectly. Again, in the unmated 

 insects I found only five which retained 23 eggs or less; 

 in the mated group there were thirty- three which re- 

 tained less than that number. 



3. ENTIRE NUMBEE OF EGGS PRODUCED BY FEMALES. 



The count was made on 64 insects, and the total num- 

 ber of eggs produced by each female was obtained by 

 adding the number of ova deposited to the number re- 

 tained at death.* 



*The numbers are thrown into groups of ten, 300 to 309, 310 to 

 319, etc. 



