CONTENTS 



Page 



Introduction.... 113 



Seasonal-history studies of 1909 114 



Spring brood of pupae 1 14 



Spring brood of moths 115 



First generation 115 



First brood of eggs ] 15 



First brood of larvae 115 



First brood of pupae 115 



First brood of moths 117 



Time of emergence 117 



Second generation 118 



Second brood of eggs 118 



Seasonal-history studies of 1910 119 



Spring brood of pupae 119 



Time of pupation 119 



Length of spring pupal stage 120 



Comparative length of pupal periods of male and female larvae 122 



Temperature conditions ] 22 



Spring brood of moths 122 



Time of emergence of moths in spring 122 



Time of emergence of moths in spring versus time wintering larvae 



leave the fruit the preceding year 123 



Relative percentage of larvae wintering from band material and per- 

 centage emerging as first-brood moths the year larvae were collected . . 124 



Time during the day when moths emerged 125 



Period of oviposition 125 



First generation 126 



First brood of eggs 126 



Incubation period 126 



First brood of larvae 128 



Time of hatching 128 



Number of larvae developing in one apple 128 



Period of feeding of larvae in fruit 128 



Larval life in the cocoon 129 



First brood of pupae 130 



Time of pupation 130 



Length of first-brood pupal stage 130 



First brood of moths 133 



Time of emergence 133 



Oviposition period 134 



Life cycle of first generation 134 



Second generation 135 



Second brood of eggs 135 



Incubation period 135 



Second brood of larvae 140 



Feeding period 140 



Time of leaving the fruit for winter 141 



Review of life-history work of 1910 142 



Ml 



