APPENDIX I 
Flies Frequenting Human Dejecta and Those 
Found in Kitchens 
I N 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 larvse 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. 
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