16 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



In Table XIII are given the results from observations on 117 indi- 

 vidual insects. Further records on the same topic are found in 

 Table XVI. The larval life in the cocoon varied from 3 to 15 days 

 with an average of 7 days. In case of a very short period of from 

 3 to 5 days the larvae abandoned its first cocoon and made a new 

 one. The records, however, only show the time consumed for 

 the making of the last cocoon. Such cocoons are very primitive 

 in appearance and have not been completed. 



Table XIII. — Length of the pupal stage of the first brood, Douglas, Mich., 1910. 



