THE CANADIAN ENTOMOLOGIST. 43 



from the surface of the dung and place them with dung which was 

 absolutely fresh and collected practically as it fell from the cow. A 

 report upon the other species was promised, but was never published, 

 although Professor Riley, in his report for 1890, listed eight parasites, only 

 two of which were specifically determined. 



The writer's recent investigations of the insect fauna of human excre- 

 ment (Proc. Wash. Acad, of Sciences, Vol. II., pp. 541-604 — Dec. 28, 

 1900) aroused his interest 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. Coquillett. The list is so interesting that it 

 should be recorded. It will be noticed that several of the species are 

 identical with those found breeding in human excrement. These are : 

 Sarcophaga incerta, Helicobia quadrisetosa, Musca domestica, Morellia 

 micans, Myospila meditabunda, Ophyra leucostoma, Sepsis violacea, 

 Sphaerocera sub sultans and Limosina albipennis. The rearing of Cerato- 

 pogofi specularis from cow-dung is of especial interest, since, down to the 

 record in the Washington Academy paper just referred to, no insects 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^:. 

 Diplosis, sp. Issued Dec. 26, 1889; and Jan. 18, 1S90 ; 4 specimens. 



Family Mycetophiud/E. 

 Sciara, sp. Issued March 26 and 29, 1S90 ; 2 specimens. 



Family Chironomid^:. 

 Camptocladius byssinus, Schrank. Issued Jan. 2, 1890. Issued Dec. 



31, 1889; and March 25, 1890; 9 specimens. 

 Camptocladius minimus, Meigen. Issued Dec. 23, 26, 27, 30 and 31, 



1S89 ; and Jan. 13, 18, and March 25, 1890 ; 12 specimens. 

 Ceratopogon specularis, Coq. Issued August 28, 1889. Issued Dec. 



30, 1889; 6 specimens. 

 Psychoda minuta, Banks. Issued Dec. 26, 30 and 31, 1889; ar >d Jan. 



11, 1890 ; 4 specimens. 



Family Rhyphid^e. 

 Rhyphus punctatus, Fabr. Issued Sept. 2, 3 and 4, 1889. Issued 



Jan. 13, 16,. 18, 20, 22, 24 and 29, Feb. 1, March 26 and 29, and 



April 5 and 9, 1890; 64 specimens. 



Family Sarcophagid/E. 

 Sarcophaga incerta, Walker. Issued Aug. 31, 1889. Issued Aug. 30, 



1889 ; 7 specimens, 



