APPENDIX I 



Flies Frequenting Human Dejecta and Those 

 Found in Kitchens 



IN summing up the results of the work carried on 

 by the writer, the number of species of insects found 

 breeding in or frequenting human excrement was very 

 large. There were many coprophagous beetles — forty- 

 four species in all — and many Hymenopterous para- 

 sites, all of the latter having probably lived in the lar- 

 val condition in the larvae of Diptera or Coleoptera 

 breeding in excrement. Neither the beetles nor the 

 Hymenoptera, however, have any importance from the 

 disease-transfer standpoint. The Diptera alone were 

 the insects of significance in this connection. Of Dip- 

 tera there were studied in all seventy-seven species, of 

 which thirty-six were found to breed in human feces, 

 while the remaining forty-one were captured upon such 

 excrement. The following list indicates the exact spe- 

 cies arranged under their proper families. The paren- 

 thetical remarks after each species should be estimated 

 in the following order, from "scarce" to ''extremely 

 abundant" : scarce, rather scarce, not abundant, mod- 

 erately abundant, abundant, very abundant, extremely 

 abundant. 



273 



