312 BIOLOGICAL SURVEY OF 



M. sociA Johan. 'Mt. Desert,' July 30 (McAtee). 



M. TRiCHOisroTA Locw. Bar Harbor; Echo Lake, June 14- 



Sept. 11. 

 M. icHNEUMONEA Say. S. W. Harbor, Sept. 6. 

 M. iMPELLANs Johan. Bar Harbor, Aug. 10. 



ScEPTONiA Winnertz 



S. NIGRA Meig. 'Mt. Desert,' July 30 (McAtee). 



BiBiONiDAE. The March Flies 



Also found around decaying vegetable matter in which they 

 breed. 



Plecia Weideman 



P. HETEROPTERA Say. S. W. Harbor ; Echo Lake ; Bar Harbor, 

 Sept. 7-13. There was a hatch at Corfield, Sept. 17. 



BiBio Latreille 



B. BASALis Loew. Bar Harbor; Echo Lake; S. W. Harbor, 



June 11-24. 

 B. LONGiPEs Loew. S. W. Harbor, Sept. 6. 

 B. sLossoNAE Coc. Record of capture lost. 

 B. VARIABILIS Loew. Bar Harbor, Echo Lake; June 8-17. 



ScATOPSiDAE. The Minute Black-Scavengers 



These are scavengers and breed in decaying matter of vari- 

 ous kinds. 



Ebichertella Euderlein 



R. FEMORALis Meig. S. W. Harbor, July 14. 



ScHWAMMERDAMiiLLA Enderlein 



S. BREvicoRNis Meig. S. W. Harbor; Narrows; Bar Harbor, 

 July 11-Aug. 18. 



Rhbgmoclema Enderlein 



R. ATRATA Say. 'Mt. Desert,' July 31 (McAtee). 



