CONTENTS 



CHAPTER I. 

 Introduction 17 



CHAPTER II. 

 Class Arachnida 22 



CHAPTER III. 



The Six-footed Insects 38 



CHAPTER IV. 



Lower Pterygota 51 



CHAPTER V. 

 Order Hemiptera 93 



CHAPTER VI. 



Neuroptera and Allies 165 



CHAPTER VII. 



Coleoptera. Beetles 172 



CHAPTER VIII. 



Lepidoptera 2U() 



CHAPTER IX. 



Order Diptera 248 



CHAPTER X. 

 Bees and Wasps 291 



CHAPTER XI. 



Principles of Economic Entomology 312 



Glossary ;j29 



Index 339 



