Rau — Observations on Samia Cecropia, Linn. 31 



majority of cases, we find that, could its life have been 

 prolonged, a fair proportion of eggs could have been de- 

 posited. The species is monagamous, all attempts to 

 mate one male with more than one female or one female 

 with more than one male being futile. 



(b) The number of eggs deposited by fertilized females. 

 Notes derived from observations in eleven instances. 



The greatest number of eggs were deposited by A 10 

 and A 10 a , which were placed in one cage, 796 eggs were 

 deposited by the two females. Perhaps one or both were 

 abnormal, as the greatest number of eggs deposited by 

 any one female was 317. The smallest number of eggs 

 were deposited by A 5, 159. The average number of eggs 

 deposited by eleven females was 263 3/11. 



J. J. Davis, 2 who has made observations on the num- 

 ber of eggs deposited by the Cecropia moth, finds that, in 

 a count of twenty lots, the greatest number deposited by 

 any one female was 366 eggs, the smallest 119 eggs, and 

 the average for the twenty lots, 243.9 eggs, which is a 

 smaller average by almost 20 than my observations give. 



(<?) The number of eggs deposited by unfertilized females. 

 Notes derived from observations in four cases. 



KNOWN AS NUMBER OF EGGS 

 B 5 113 



Bl 135 



B la ) „ Rn 



B 2a \ 6m 



The average number of eggs deposited by four unfer- 

 tilized females was 157. 



2 Entomological News. 368. D 1906. 



