CONTENTS. 
Page. 
Introduction 7 
Nature and extent of injury 8 
Description 8 
The adult female 9 
The adult male : 10 
Recently emerged adults 10 
The egg 10 
The first-stage larva 10 
The second-stage larva 11 
The young nymph or prepupa 12 
The full-grown nymph or pupa 13 
Origin and distribution 14 
History 16 
Recent records 16 
Habits of the adult 17 
Method of mating 17 
Method and time of oviposition 18 
Number of eggs and period of oviposition • 19 
Proportion of the sexes 20 
Kinds of reproduction 20 
Feeding habits 20 
Flight 21 
Leaping 22 
Normal length of life 22 
Length of life in winter • 22 
Habits of the larva 23 
Hatching 23 
Molting 25 
Habits of the prepupa and pupa 26 
Food plants 27 
Beans 27 
Other vegetables 28 
Pear 28 
Alfalfa. 28 
Cotton 30 
Wild plants 30 
Seasonal history at Compton, Cal 31 
The egg : . . . 31 
The larva 32 
The prepupa and pupa 34 
Total life cycle 36 
Emergence from hibernation 36 
Entrance into hibernation 36 
Number of generations 37 
5 
