CONTENTS 
Page. 
Acknowledgments 
Classification adopted 
Introduction .. .. .. .. .. 1 
Diagnosis .. .. .. ., .. 1 
Zoological position .. .. .. .. 2 
Instinct and Habit .. . . . . . . 2 
Classification . . . . . . . . 10 
Number of species .. . . .. . . 14 
Nomenclature . , . . . , . . 15 
Identification .. .. . . . . . . 15 
Entomology in India . . . . .. . . 17 
Zoo-geographical Divisions . . . . , . .. 20 
Food and Habitat . . .. . . .. 27 
Insects and Man .. . . .. .. 35 
Aptera .. . . .. .. .. 43 
Orthoptera .. .. .. .. .. 47 
Where Insects live .. . . . . .. 54 
Cosmopolitan Insects .. . . .. .. 62 
Deceptive Colouring .. . . . . . . 90 
Attraction to light .. „. . . . . 106 
Neuroptera .. .. .. .. .. 108 
Gregariousness . , .. .. . . 123 
Aquatic Insects .. .. . . . . 131 
Relative Duration of Life . . . . . , . . 140 
Hymenoptera .. .. .. . . .. 161 
Galls .. . . .. .. 167 
Size of Insects . . . . . . .. .. 169 
Sex . . . . . - .. .. 188 
Insects and Flowers . . .. .. .. 222 
COLEOPTERA . . . . . . . . . . 234 
Myrmecophilous Insects .. .. .. .. 268 
Insects as Food .. .. .. .. 276 
Lepidoptera .. .. .. .. .. 397 
Migration .. . . .. .. . . 419 
Emergence from the Cocoon .. .. .. 481 
Silk .. .. .. .. ..485 
How Insects protect themselves .. .. .. 521 
