CONTENTS 



CHAPTER I 



PAGE 



The Form of Insects . . . . i 



What is an Insect? 1-4; Cell-structure, Chitin, 4-5; 

 Examination of a typical Insect Cockroach) and Com- 

 parison with other Insect-types : — Head and Appendages, 

 6-19 : Fore-body or thorax, legs and wings, 20-29 ' Hind- 

 body or Abdomen, 30-31: Nerves and Sense-organs, 31-49 : 

 Muscles, 49-54; Blood-system and Fat-body, 54-57; Air- 

 tubes, 57-61 : Food-canal, 61-67 '• Glands and Kidney- 

 tubes, 67-72: Reproductive Organs, -2-83. 



CHAPTER II 



The Life-History of Insects . . .84 



The Egg, 84-86 ; Fertilization, Polar-bodies and Virgin 

 Reproduction, 86-89 • Embryonic Development, 89-iaa ; 

 Hatching and Growth, 100-103 • Forms of Larvs, 103-111 ; 

 Adaptation of Larvse, 111-114: Moulting and Metamor- 

 phosis, 114-118 : Pups, 118-121: Formation and Emerg- 

 ence of Imago 121-124: Larva and Imago, 124-12-. 



CHAPTER in 

 The Classification of Insects . . .128 



Objects of Systematic Zoology, 128-129: Variety and 

 Species, 129-136 ; The Causes of Variation and the Origin 

 of Species, 136-149: Genus and Family, 149-155 ; Order, 

 156-157 : Natural Classification, 157-159. 



