INSECT FAUNA OF HUMAN EXCREMENT 599 



more than 200 deposits were collected from May to October. 

 On November 8, eight specimens were captured on a deposit 

 in the field and very many were noticed upon faeces in a low 

 part of Washington. November 10, with the thermometer at 

 65° (rather warm for this season of the year) very many more 

 were noticed about fresh deposits, copulating and presumably 

 ovipositing. Some of these deposits were placed in a breeding 

 cage, and March 3, 1900, 12 adults issued. 



Scatofhaga ster cor aria Linn. 

 This species, common to Europe and North America, was 

 captured during the summer of 1899 on deposits at Travilah, 

 Maryland, at Washington, District of Columbia, and in a privy 

 at Charlestown, West Virginia. 



Fucellia fucorum Fall. 

 Four specimens of this species were captured on excrement 

 at Tybee Island, Georgia, in February, 1899, by Mr. Busck. 

 Four other specimens were collected on Culebra Island, Porto 

 Rico, in February by the same observer. 



Family MICROPEZID^. 



These flies, somewhat related to the Sepsidce, are little known 

 and their metamorphoses do not appear to have been observed. 



Calobata fasciata Fab. 

 Specimens of this species were collected upon human faeces 

 by Mr. Busck in Porto Rico. 



Calobata antenmpes Say. 

 This species, reasonably common in the District of Columbia, 

 is said by Mr. Burden, a Washington entomologist, to frequent 

 human faeces in this vicinity. 



Family HELOMYZID^. 



The flies of this family, which is not distantly related to the 

 Scatophagidae, occur in the larval condition in fungi and one 

 species in Europe feeds upon truffles. These flies seem to pre- 

 fer damp shady places and fly in the twilight. 



