INSECT FAUNA OK HUMAN EXCREMENT 583 



dung. O. leucostoma is found both in Europe and North 

 America, and is recorded by Osten Sacken as common in the 

 AtLantic States. It is a rather small, shining, metallic tly ap- 

 pearing like a small bluebottle fly. According to Bouche its 



Fig. 30. Limnophora arcuata: adult— enlarged (original). 



larviE in Europe live in decaying vegetable material. It was 

 reared June 30 from miscellaneous faeces collected during the 

 early part of the month, many specimens being obtained in this 

 way It was also captured in the sinks at the District of Co- 

 lumbia Militia Camp at Leesburg, Virginia. It has not been 

 caught in our series of fly-paper experiments, but on the even- 

 ing of October 25, 1899,^ when the weather was warm and 

 threatening, flies of this species swarmed in the second story of 

 Mr Pratt's house in southwest Washington. 



Either this or a very closely allied species breeds in corpses 

 in Europe, according to Megnin, while this species was abun- 

 dantly bred by Motter from the corpses of dogs m the course 

 of his studies on the ' Fauna of the Grave.' 



Phorhia cinerella Fall. 

 The present species is another small fly, common to Europe 

 and North America, which the average person would be likely 

 to take for a very small house fly. It has been captured and 

 bred at Washington, District of Columbia, Leesburg, Virgmia, 

 and Snickers Gap, Virginia. It was first collected June 6 upon 



