Vlll. CONTENTS 



PAGE 

 V. The Anatomy of the Larva: 



1. External Structure 70 



2. Muscular System 73 



3. Nervous System 79 



4. Alimentary System 83 



5. Kespiratory System 88 



6. Vascular System and Body Cavity 90 



7. Imaginiu Discs ... 92 



VI. Summary of Part II 95 



VII. Literature 98 



VIII. Explanation of Plates 3033 101 



Part 111. The Bionomics, Allies, Parasites, and the Relations of 

 M. domestica to Human disease. 



I. Introduction 107 



II. Distribution of M. domestica 108 



III. Flies occurring as Co-inhabitants of Houses with 



M. domestica or as visitants 110 



IV. Physiology: 



1. Influence of Food, Temperature and Light... 121 



2. Hibernation 122 



3. Flight 123 



4. Regeneration of Lost Parts 124 



V. Natural Enemies and Occasional Parasites 125 



1. Chernes nodosus, Schrank 126 



2. Acarina or Mites borne by House-flies ... 128 



3. Fungal parasite Empusa muscae, Cohn ... 130 

 VI. True Parasites: 



1. Flagellata Herpetomonas muscae-domes- 



ticae 133 



Crithidia muscae-domesticae . . . 138 



2. Nematoda Habronema mmcae 139 



3. Dissemination of Parasitic Worms . 141 



