STRUCTURE, DEVELOPMENT, AND BLIONOMICS OF HOUSE-FLY. 495 
The Structure, Development, and Bionomics of 
the House-fly, Musca domestica, Linn. 
Part II.—The Breeding Habits, Development, and the Anatomy 
of the Larva. 
By 
Cc. Gordon Hewitt, M.Sc., 
Lecturer in Economic Zoology, University of Manchester. 
With Plates 30—33. 
ContTENTS. 
: PAGE 
J, Introduction. : : : . 496 
II. Breeding Habits : , : . 497 
Ill. Factors and Rate of Development . , = 900 
IV. Development : 
1. Copulation : ‘ . 505 
Delicot =. ; : : . 506 
3. Larva . : : : . 506 
Ae Puna). : : : . 508 
V. Anatomy of the Larva: 
1. External Structure f ; 2 old) 
2, Muscular System . ; : 2 Ble 
3. Nervous System . : | ALG) 
4, Alimentary System : : . 523 
5. Respiratory System ‘ : sD28 
6. Vascular System and Body Cavity : 5 aK0) 
7. Imaginal Dises_. : 5 
VI. Summary : ; : : . 535 
VII. Literature ; ; ; : > 538 
VOL, 52, PART 4,—NEW SERIES. 38 
