156 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



SECOND GENERATION. 



SECOND BROOD OF EGGS. 



Incubation 'period. — In all, 845 eggs were deposited during the 33 

 days on apples in the cages used for this purpose. No record was 

 kept as to how many eggs a single female deposited, but, judging 

 from the number of female moths confined and the eggs deposited 

 by them, the average for each female must have been about 40. No 

 record was kept as to the time of day the females selected for ovipo- 

 sition, but observation throughout the day showed moths ovipositing 

 from early in the morning until evening. Table XLVI shows the 

 length of the egg stage for 760 individuals. 



Table XLVI. — Second-brood eggs. Incubation period of eggs laid in the rearing cages. 



