CONTENTS. 



Page 



Author's Pbeface v 



Glossary ^^ 



Systematic Index x-^"i 



Errata and Addenda. 



1. External Anatomy of a Fly -5 



A. Terminologii 'j 



The Head ^ 



The Thorax 4 



The Abdomen 7 



The Legs ' 



The Wiugs 8 



B. Descriptive 17 



The Head 1' 



The Thorax 22 



The Abdomen 22 



The Legs 23 



The Wings 23 



2. Internal Anatomy 25 



3. The Early Stages OF Dii'TEii a 26 



The Larva 20 



The Pupa 27 



The Habitats 27 



4. On THE Collection of Diptera 28 



5. The Mounting and Preservation of Diptera .... 30 



6. Standard Works fob Students 34 



7. Estimated Number of known Species 35 



8. The Classification of the Diptkra 37 



9. The Suborders of the Diptera 39 



Orthorrhwpha 39 



Nematocera 40 



Brachycera 41 



Cyclovyhaplia 39 



