150 



DECIDUOUS FEUIT INSECTS AND INSECTICIDES. 



The average length of life of the moths in cage A was 10.5 days, 

 while that of those in cage B was 7.41 days. The combined average 

 was thus 9.19 days. 



Table XXXVI. — Longevity of moths of spring brood. Summary of Table XXXV. 



FIRST GENERATION. 



FIRST BROOD OF EGGS. 



Incubation period. — In the preceding pages the length of the period 

 of egg deposition was considered under the habits of the moth. 



A record of the length of the egg stage for 34 eggs is shown in Table 

 XXXVII. As mentioned before, the earliest emerging moths would 

 not oviposit in the cages, and it is probable that all eggs deposited 

 previous to June 1 required from 15 to 18 days for the egg stage. 



Table XXXVII. — First-brood eggs. Incubation period of eggs laid in the rearing cages. 



Table XXXVIII shows a summary of Table XXXVII. 

 Table XXXVIII. — Incubation period of first-brood eggs. Summary of Table XXXVII. 



