94 



THE BREEDING HABITS OF Mi'SCA DOMESTICA 



It \\ ill bo seen that, out of 649 Hies of various species which 

 were bred from larvae found in garbage, 136 or 22'4 per cent, 

 were Musca domestica. 



Summary of Substances in which Musca domestica 



Breeds. 



All the foregoing observations on the breeding places and 

 substances in which flies breed may be conveniently summarised 

 as follows : 



Horse-manure 

 Human excrement 

 Fowl excrement 



Excrementous 



Cow-manure 

 Pig-manure 



Rabbit-manure 



Vegetable 



Spent hops 

 Decaying grain 

 Cooked peas 

 Rotten water melon 



„ musk or other melons 



„ cucumber 



„ carrots 



„ cabbage 



„ potato and peelings 



Barley malt 



Excreta-soiled straw 



Bread or cake 

 „ and milk 



Rotten apricots 

 „ bananas 

 „ cherries 

 „ plums 

 „ peaches 



Rotten meat 



Carrion 



Cattle paunch contents 



Boiled rice 



Animal matter 



Rotten fowl feathei's 

 Old broth 

 Boiled egg 



Miscellaneous 



Snuff 



Expectoration with earth 

 Excreta-soiled paper, rags 

 Ensilage 

 Rubber 



Kitchen refuse 



Fermenting substances in ashpits 



Sawdust and excrementous refuse 



Garbage pile drainage 



Cesspool 



All observations which have been made indicate that the chief 

 breeding place of the house-fly is horse-manure or stable-refuse, 

 and that, in addition, it is able to breed in other forms of excre- 

 ment and in rotting or decaying animal and vegetable substances, 

 especially when they are in a fermenting condition. 



