CONTENTS. 



PAGE 



Introduction, 21 



History and distribution, 22 



Food plants, 24 



Name, 25 



Injuries, 26 



Importance, 27 



Life history and habits, 28 



Adult, 28 



Habits, 28 



Mating, 29 



Feeding, 31 



Oviposition, 33 



Egg, 37 



Larva, 38 



Pupa, 42 



Length of life cycle, 45 



Number of generations, 45 



Hibernation, 45 



Control, 46 



Conclusions, 48 



Natural enemies, 49 



Summary, 50 



Bibliography, 52 



Explanation of plates, 52 



