220 BIOLOGICAL SURVEY OF 



PsiLA Meigen 



P. BicoLOR Meig. Bar Harbor; S. W. Harbor, July 17-22. 

 P. LEVIS Loew. Bar Harbor ; S. W. Harbor, June 11-21. 

 P. LONGULA Johns. Eclio Lake; Bar Harbor; Green Mt., 

 July 17-25. 



NOTIPHILIDAE 

 Clanoneurum Becker 



C. ciMiciFORMis Halid. Marsh at the Narrows, Aug. 15, 1920. 



PsiLOPA Fallen 



P. ATRiMANA Loew. Bar Harbor, July 24; S. W. Harbor, 



Sept. 6. 

 P. LEucosTOMA Meig. Narrows, July 27. 



Trimerina Macquart 



T. MADiZANs Fall. Bar Harbor, Aug. 16. 



Ehysophora Cresson 



R. ROBusTA Cress. Witch Hole Pond, July 30. 



Ditrichophora Cresson 



D. ExiGUA Cress. Bar Harbor, July 22, 1919. 

 D. PARiLis Cress. Bar Harbor, Aug. 18. 



DiscocERiNA Macquart 



D. LEUCOPROCTA Loew. Narrows, June 9. 



Hydrellia K.-Desvoidy 



H. FORMOSA Loew. Bar Harbor, Aug. 12-16. 

 H. oBscuRiPEs Loew. Bar Harbor, Aug. 16. 

 H. scAPULARis Loew. Narrows, July 27-Aug. 13. 

 H. TIBIALIS Cress. Bar Harbor, Aug. 10. 

 H. VALiDA Loew. Narrows, July 27-Aug. 13. 



Ilythea Haliday 



I. spiLOTA Curtis. Common, June 27-Aug. 21. 



Notiphila Fallen 



N. LOEwi Cress. {N. unicolor Loew, not Walker). Bar Har- 

 bor, June 22. 

 N. viTTATA Loew. Bar Harbor, Julv 20-26. 



