/V 



-V ' 



F&3JI 



vri 



CONTENTS. 



Page 



AUTHOR'S PREFACE v 



GLOSSARY ix 



SYSTEMATIC INDEX xxiii 



ERRATA AND ADDENDA. 



1. EXTERNAL ANATOMY OF A FLY 3 



A. Terminology 3 



The Head' 3 



The Thorax 4 



The Abdomen 7 



The Legs 7 



The Wings 8 



B. Descriptive 17 



The Head 17 



The Thorax 22 



The Abdomen 22 



The Legs 23 



The Wings ... 23 



2. INTERNAL ANATOMY 25 



3. THE EARLY STAGES OF DIPTERA 26 



The Larva 26 



The Pupa 27 



The Habitats 27 



4. ON THE COLLECTION OF DIPTERA 28 



5. THE MOUNTING AND PRESERVATION OF DIPTERA .... 30 



6. STANDARD WORKS FOR STUDENTS 34 



7. ESTIMATED NUMBER OF KNOWN SPECIES 3-"> 



8. THE CLASSIFICATION OF THE DIPTERA 37 



9. THE SUBORDERS OF THE DIPTERA 39 



Ortliorrhaplut 39 



Nematocera 40 



Srachycera 41 



Cydorrhaplia 39 



529927 



