TABLE OF CONTENTS 



PART I. THE STRUCTURE AND METAMORPHOSIS 

 OF INSECTS 



CHAPTER I 



PAGES 



THE CHARACTERISTICS OF INSECTS AND THEIR NEAR RELATIVES i 



Phylum Arthropoda I 



List of the classes of the Arthropoda 2 



Table of the classes of the Arthropoda 



Class Onychophora 



Class Crustacea \ .......... ./. 6 



Class Palaeostracha .-. J 8 



Class Arachnida .X /. 9 



Class Pycnogonida /. 10 



Class Tardigrada : 12 



Class Pentastomida 14 



Class Diplopoda 15 



Class Pauropoda 14 



Class Chilopoda 28 



Class Symphyla 23 



Class Myrientomata 26 



Class Hexapoda 20 



CHAPTER II 



THE EXTERNAL ANATOMY OF INSECTS 29 



I. THE STRUCTURE OF THE BODY- WALL 



a. The three layers of the body- wall 29 



The hypodermis 29 



The trichogens 30 



The cuticula 30 



Chitin 30 



Chitinized and non-chitinized cuticula 3 



The epidermis and the dermis 3* 



The basement membrane 3 1 



b. The external apophyses of the cuticula 3 1 



The cuticular nodules 31 



The fixed hairs. 3* 



The spines 3 2 



c. The appendages of the cuticula 3 2 



The spurs ... 3 2 



