TABLE OF CONTENTS. 
PAGE 
Introduction . vii 
CHAPTER I. 
Animals Classified. £ 
CHAPTER II. 
Material for Study. 4 
CHAPTER III. 
Activities Common to All Animals. ...^. 24 
CHAPTER IV. 
Grasshoppers and Crickets. 32 
CHAPTER V. 
Butterflies and Moths with their Protective Devices... 45 
CHAPTER VI. 
Some Insects Classified. 57 
CHAPTER VII. 
A Chapter of Life-Histories. 68 
xiii 
