282 THE HOUSE FLY— DISEASE CARRIER 



port for 1890, listed eight parasites, only two of which 

 were specifically determined. 



The writer's recent investigations of the insect fauna 

 of human excrement (Proc. Wash. Acad, of Sciences, 

 Vol. II, pp. 541-604. Dec. 28, 1900) aroused his in- 

 terest in the general subject of coprophagous insects, 

 and the flies reared in 1889-90, from cow dung, were 

 looked up and have been named by Mr. D. W. Coquil- 

 lett. The list is so interesting that it should be re- 

 corded. It will be noticed that several of the species 

 are identical with those found breeding in human ex- 

 crement. These are: Sarcophaga incerta, Helicohia 

 quadrisetosa, Miisca domestica, Morellia micans, My- 

 ospila meditahimda, Ophyra leucostoma, Sepsis viola- 

 cea, Sphccrocera siihsidtans and Limosina alhipennis. 

 The rearing of Ceratopogon spccularis from cow dung 

 is of especial interest, since, down to the record in the 

 Washington Academy paper just referred to, no in- 

 sects of this genus had been found to be coprophagous. 

 Some of the other records are interesting for the same 

 reason. The list follows: 



Family Cecidomyid/e 

 Diplosis, sp. Issued Dec. 26, 1889; and Jan. 18, 1890; 

 4 specimens. 



Family Mycetophilid.^ 

 Sciara, sp. Issued March 26 and 29, 1890 ; 2 specimens. 



Family Chironomid^. 

 Camptocladius byssiniis, Schrank. Issued Jan. 2, 1890. 

 Issued Dec. 31, 1889; and March 25, 1890; 9 speci- 

 mens. 



