(1) 



STRUCTURK, DEVELOPMENT, AND BIONOMICS OF HOUSE-FLY. 395 



The Structure, Development, and Bionomics of 

 the House-fly, Musca domestica, Linn. 



Part I. The Anatomy of the Fly. 



By 



. Gordon Hewitt, IH.Sc., 



Lecturer in Economic Zoology, University of Manchester. 



With Plates 2226. 



CONTENTS. 



PAGE 



I. Introduction . . . . . 395 (1) 



II. Methods 399 (5) 



III. External Structure. 1. Head . * .400 (6) 



2. Thorax . . .406 (12) 



3. Abdomen . . .414 (20) 



IV. Internal Structure. 1. Muscular System . . 415(21) 



2. Nervous System . . 416 (22) 



3. Alimentary System . . 420 (26) 



4. Respiratory System . 424 (30) 



5. Vascular System and Body 



Cavity . . .429 (35) 



6. Reproductive System . 430 (36) 

 V. Internal Structure of Head . . . .435 (41) 



VI. Summary ...... 439 (45) 



VII. Literature .442 (48) 



I. INTRODUCTION. 



THIS paper is intended to be the first of a series of three 

 dealing with the anatomy, development and bionomics of the 

 House-fly, Musca domestica, L. The second part will 



