XIV LIST OF PLATES 



FACING PAGE 



PyowsoDia margbiale 



Pyctwsoma cJiloropyga 



Pycnosojna putorium 



Oscinis pallipes ....... 82 



Photograph of part of a window pane soiled by flies 

 „ 2. Photograph of a fly cage showing 'spots' 

 „ 3. Photograph of crop contents of a fly three days 

 after feeding on the blood of a mouse dead 

 of anthrax ....... 86 



XIX. Photographs of fly cages 92 



XX. Photographs of plate cultures of the organs of flies experi- 



mentally fed on emulsions of i5. czw/Z^r^jf/^ . . . 180 



XXI. Fig. I. Congo floor-maggot fly, Aiichincroviyia luteola 



„ 2. Congo floor-maggot 



„ 3. Screw- worm fly, Chrysomyia macellaria . . 214 



XXII. Fig. I. Screw-worm 



„ 2. Tumbu fly, Cordylobia anthropophaga 



„ 3. Maggot fly, Bengalia depressa .... 220 



XXIII. Photograph of larva? of Gastrophilus equi attached to the 



mucous membrane of the stomach of the horse . 228 



XXIV. Figs I, 2, 3. Photographs of flies dead of Empiisa musae 



„ 4 & 5. Photographs of Habroiieina iniisca . . 230 



