OUTLINE. 



PAGE. 

 GENERAL CONSIDERATIONS 177 



Early accounts ; Destructiveness ; Distribution, general, local. 



LIFE HISTORY AND HABITS 181 



OVERWINTERING ADULTS 181 



Food habits ; Relation of food to development and activity ; Influence of 

 temperature upon activity ; Proportion of the sexes ; Migrations ; Time they 

 attack the vine ; Do they feed exclusively on the vine ; Habits on the vine ; 

 Copulation and oviposition. 



THE EGG 3SG 



Description and appearance ; Where laid ; Number ; Rate of egg laying ; 

 Incubation period ; Percentage of eggs that hatch ; Effect of oviposition 

 upon the leaf. 



THE NYMPH 102 



The hatching process ; First stage ; Second stage ; Third stage : Fourth 

 stage ; Fifth stage ; Moulting ; Habits of feeding ; Transfer 'to other food 

 plants. 



THE ADULT 19G 



Time of reaching maturity ; Feeding habits ; Copulation and oviposition ; 

 Activity and migrations ; Activity of the sexes ; Proportion of the sexes ; 

 Differences in coloring; The varieties of the species comes : Proportion of the 

 varieties ; Common name of the insect ; Preferences for different varieties of 

 vines. 



DEVELOPMENT 200 



Length of life cycles ; Number of generations ; Comparisons of development 

 in other localities. 



NATURAL CONTROL . 202 



Climatic ; Parasitic ; Predatory ; Fungous. 



MECHANICAL CONTROL 203 



Blowers and suction ; Torches ; Dry powders ; Sticky shields ; Fumigation ; 

 Sprays and washes ; Screens or cages. 



FARM PRACTICES 214 



Plowing ; Sheeping. 



SUMMARY 215 



LITERATURE . . 217 



