(106) 

 STRUCTURE, 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 

 . Gordon Hewitt, D.Sc., 



Late Lecturer in Economic Zoology, University of Manchester. 



With Plate 22. 



CONTENTS. 



PAGE 

 I. Introduction. ,... . . . .348(107) 



II. Distribution . ... 349 (108) 



III. Flies occurring as Co-inhabitants of Houses with M. 



domestica or as Visitants . -. ., ,< .351(110) 



IV. Physiology : 



1. Influence of Food, Temperature, and Light . . 362 (121) 



2. Hibernation . . . . .363 (122) 



3. Flight . . . . . .364 (123) 



4. Regeneration of Lost Parts . || .365(124) 

 V. Natural Enemies and Occasional Parasites : 



1. Ghernes nodosus, Schrank . f .367 (126) 



2. Acarina or Mites borne by House-flies . . 369 (128) 



3. Fungal parasite Empusa muscse, Cohn .. .371 (130) 

 VI. True Parasites : 



1. Flagellata Herpetomonas muscse- domesticse . 374(133) 



Crithidia muscse-domesticse . 379 (138) 



2. Nematoda Habronema muscse . ,' . 380 (139) 



3. Dissemination of Parasitic "Worms . . . 382 (141) 

 VII. Dissemination of Pathogenic Organisms by M. domestica 



and its non-Blood-sucking Allies : 



1. Typhoid Fever . . . . . .385 (144) 



2. Anthrax . . . ... 394 (153) 



3. Cholera . . . . . .396 (155) 



4. Tuberculosis . . 398 (157) 



