48 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



FIRST BROOD OP PUP/E OR SUMMER PUP/E. 



Time of jpwpation. — The time of pupation as represented in figure 

 20 has been determined on the basis that the time and rate of emer- 

 gence of the moths must be in close relation and in direct proportion 

 to the time and rate of pupation. Observations on pupation in the 

 rearing cages extended from July 6 to August 8. In the field, how- 



