CONTEXTS. 
Page. 
Classification and synonymy 13 
Common names 14 
History 15 
Distribution 19 
Western limit of occurrence 21 
Northern limit of occurrence 24 
Southern limit of occurrence 25 
Distribution of the curculio according to life zones 25 
Reported introductions of the curculio 26 
Losses due to the plum curculio 27 
Insects likely to be mistaken for the plum curculio 28 
Description 30 
The egg 30 
The larva 30 
The pupa 32 
The adult 33 
Food plants 33 
Fruits in which the larvae fail to mature 38 
Life history and habits 39 
The egg 39 
Number of eggs deposited 39 
Length of egg stage 48 
The larva 54 
Habits of larvae just hatched and course taken in fruit 54 
Larval instars 55 
Death of larvae in fruit 56 
Desertion of fruit by undersized larvae 59 
Normal emergence of larvae from fruit during the season 60 
Manner of leaving the fruit and entering soil 64 
Time spent in the fruit (egg and larval stages combined) 65 
The pupa= 73 
Length of time spent in the soil 73 
Length oi pupal stage, and time spent in soil before and after pupation . 83 
Depth or pupal cell 87 
Soil conditions affecting transformations of the curculio in the ground . . 88 
The adult 92 
Period of emergence of beetles 92 
Proportion of sexes 95 
Choice of food by curculio 96 
Extent of feeding of the respective sexes 98 
Operation of egg laying 99 
Egg and feeding punctures: Position on fruit and variation in form . . . 103 
Relative number of feeding and egg punctures 106 
Activity of the beetles in egg laying and feeding, by day and by night . . 107 
Time required for transformation from egg to adult 110 
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