CONTENTS. 



Preface. Introduction. 



Part I. Anatomy of the Fly. PAGE 



I. Introduction 1 



II. Methods 5 



III. External Structure: 



1. Head ... ... 6 



2. Thorax 12 



3. Abdomen 20 



IV. Internal Structure: 



1. Muscular System 21 



2. Nervous System ... 22 



3. Alimentary System 26 



4. Respiratory System ... 30 



5. Vascular System and Body Cavity 35 



6. Reproductive System 36 



V. Internal Structure of Head ... 41 



VI. Summary of Part 1 45 



VII. Literature 48 



VIII. Explanation of the Plates 2226 50 



Part 11. The Breeding Habits, Development, and the Anatomy of 

 the Larva. 



I. Introduction ... 56 



II. Breeding Habits 57 



III. Factors and Rate of Development 60 



IV. Development : - - 



1. Copulation 65 



2. Egg 66 



3. Larva 66 



4. Pupa 68 



