LIST OF ILLUSTRATIONS 



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The adult house-fly. ( x 5.) . 

 Maggot of house-fly. (x 3|.) 

 Puparium of house-fly. ( x 5.) 

 Foot of house-fly, showing pulvilli, enlarged 

 Plate of gelatine, showing colonies of bacter 

 prints of fly. (x 1.) After Underwood 

 Head and proboscis of house-fly. ( x 20.) 

 Bin for holding manure. After Herms . 

 Hodge's trap for garbage can. After Howard 

 A large fly trap. After Bull . 

 End of trap, showing hooks. After Bull 

 Cross-section of trap. After Bull . 

 Wing of the lesser house-fly. ( x 10.) 

 Wing of house-fly. ( x 10.) 

 Wing of stable-fly (Muscina stabulans). (x 8 

 The cluster-fly. ( x 2f) .... 

 Head and proboscis of the biting house-fly. 



Biting house-fly (Stomoxys calcitrans). (x 3i 



(x3.) 



The stable-fly (Muscina stabulans) 

 The blow-fly. ( x 2.) 

 Life history of a house mosquito. ( x 3.) After Howard 

 Egg mass of the house mosquito, (x 5.) 

 Pupa of Culex, enlarged .... 

 Head of female, left; male, right, (x 8.) 

 Anopheles quadrimaculatus. ( x 7.) 

 Larva of Anopheles punctipennis, enlarged 

 Anopheles punctipennis. ( x 7.) 

 Head of female Culex, left ; female Anopheles, right 

 (x8.) .... 



a in 



) 



x 8.) 

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foot- 



1 



4 



5 



7 



8 

 9 

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 25 

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 27 

 27 

 36 

 36 

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 49 

 56 

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 61 

 62 

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65 



XI 



