24: 



DECIDUOUS FEUIT INSECTS AND INSECTICIDES. 



Table XXV. — Incubation period of eggs of the second brood in rearing cages, Douglas, 

 Mich., 1910; summary of Table XXIV. 



SECOND BROOD OF LARVAE. 



Time of Thatching. — The time of hatching of second-brood larvae 

 under orchard conditions has been determined by methods described 

 on page 14 for the first brood. A maximum abundance of newly 

 hatched larvae occurred about September 10. The earliest larva of 

 the brood hatched August 12. In the cages several late-deposited 

 eggs failed to hatch, and it is possible that eggs in the field at this 

 time would likewise remain undeveloped. 



Table XXVI. — Length of feeding of second-brood larvse, Douglas, Mich., 1910. 



