.594 



HOWARD 



times as large as the smallest ones. It was captured on human 

 excrement at Washington, at Travilah, Maryland, and at Lees- 

 burg and Snickers Gap^ Virginia, in April, May, June and 

 July, 1899, and as early as the 25th of March, 1900, it was 

 noticed by Mr. Pratt, on and around human faeces deposited 

 near Chesterbrook, Fairfax County, Virginia. It was also seen 

 about a dead horse. No other flies were seen at this time, 

 probably on account of the cold weather following the 23d, 

 which was warm, with a maximum temperature of 68° F. and 

 a minimum temperature of 32° F. A wet snow followed on 

 the 26th of March. The larva and puparium of this species 

 were described by Haliday in the Entomological Magazine, iii 

 (1836), pp. 335-6. Eggs laid in the first week in October re- 

 mained unchanged until the end of the month. 



Borborus geniculatus Macq. 

 This is an European species, recognized here by Mr. Coquil- 

 lett. Mrs. Slosson has captured it in New Hampshire on Mt. 



Fig. 34. Limosina albipennis, adult — enlarged (original). 



Washington. It was captured upon excrement at Wasliington 

 and at Travilah and Marshall Hall, Maryland, by Mr. Pratt, 



