248 THE PLUM CURCULIO. 
Page. 
Plum curculio, adult, extent of feeding of respective sexes 98-99 
period of emergence 92-95 
proportion of sexes 95-96 
relative number of feeding and egg punctures 106-107 
appearance of beetles in spring, relation of temperature thereto. 118-120 
time 112-118 
beetles (see also Plum curculio, adult). 
appearance in spring, relation of temperature thereto . . 118-120 
time 112-118 
from emergence to hibernation 127-129 
occurrence in orchards 120-125 
bibliography 219-241 
classification '. 13-14 
description 30-33 
distribution 19-27 
according to life zones 25 
egg and feeding punctures, position on fruit and variation in 
form 103-106 
relative number 106-107 
description 30 
laying and feeding activity by day and by night 107-110 
operation 99-102 
length of stage 48-54 
number deposited 39^8 
enemies, natural 139-154 
feeding and egg laying activity by day and by night 107-110 
punctures, position on fruit and variation in 
form 103-106 
relative number 106-107 
food plants 33-39 
fruit punctured or infested, percentage 134-139 
generations, number annually 125-127 
habits 39-112 
hibernation 129-132 
mortality during period 132-134 
history 15-19 
insects likely to be mistaken therefor 28-29 
introductions reported 26 
larva, description 30-32 
habits of those just hatched and course taken in fruit — 54-55 
instars 55-56 
larvae, death in fruit 56-59 
fruits in which they fail to mature 38 
manner of leaving fruit and entering soil 64-65 
normal emergence from fruit during season 60-64 
undersized, desertion of fruit 59-60 
life history 39-112 
limit of occurrence, northern 24-25 
southern 25 
western 21-24 
losses due thereto 27-28 
mortality during hibernation 132-134 
names, common 14-15 
