22 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XXII.— Length of life cycle of the first generation, as determined by rearing in 



1910 at Douglas, Mich. 



Table XXIII.— Life cycle of the first generation; summary of Table XX LI. 



The results of these experiments are given in Tables XXII and 

 XXIII. Although limited in number the results of these experiments 

 agree very closely with those of the previous experiments for the 

 separate stages, namely, the life-cycle experiments averaged 51.5 days, 



