STEUCTUEE, DEVELOPMENT, AND BIONOMICS OF HOUSE-FLY. 347 
The Structure, Development, and Bionomics 
of the House-fly, Musca domestica, Linn. 
Part III. — The Bionomics, Allies, Parasites, and the Relations 
of M. domestica to Human Disease. 
By 
Cior<loii Hewitt, D.Se., 
Late Lectui'er in Economic Zoology, University of Manchester. 
With Plate 2 ± 
CONTENTti. 
PAGE 
I. Introduction . . . . . . 348 
II. Distribution ...... 34h 
III. Flies occurring as Co-inhabitants of Houses with M. 
domestica or as Visitants .... 351 
IV. Physiology : 
1. Influence of Food, Temperature, and Light . . 382 
2. Hibeniation ..... 383 
3. Flight ...... 384 
4. Regeneration of Lost Parts . . 385 
V. Natural Enemies and Occasional Parasites : 
1. Chernes nodos\xs, Schrank . . . 387 
2. Acarina or Mites borne by House-flies . . 38U 
3. Fungal parasite — Empusa muscse, Cohn . . 371 
VI. True Parasites : 
1. Flagellata — Herpetonionas musca; - domestica) . 374 
Crithidia nixisca;-domestica; . 379 
2. Nematoda — Habronema uixxsca- . . . 380 
3. Dissemination of Parasitic Worms . . . 382 
VII. Dissemination of Pathogenic Organisms by M. domestica 
and its non-Blood-sucking Allies : 
1. Tyj)hoid Fever ..... 385 
2. Anthrax ..... 394 
3. Cholera ...... 398 
4. Tuberculosis ..... 398 
