330 BIOLOGICAL SURVEY OF 



PiPXJNCUL.tJS Latreille 



P. AEQuus Cress. Duck Brook, Sept. 11, 1922. 



P. ATLANTicus Hough. Bar Harbor, June 7. 



P. CAUDATUS Cress. Bar Harbor ; Upper Hadlock Pond ; S. W. 

 Harbor, June 9-25. 



P. ciNGULATUS Loew. Bar Harbor ; Echo Lake, July 12. 



P. DUBius Cress. Salisbury Cove ; Green Mt., July 24^25. 



P. ruscus Loew. S. W. Harbor ; Salisbury Cove, July 20-23. 



P. HORVATHi Kertz. Echo Lake, June 17. 



P. MINOR Cress. Salisbury Cove, July 15. 



P. PALLiPEs Johns. Bar Harbor; Long Pond, June 10-20. 



P. scoPARius Cress. Salisbury Cove ; Echo Lake ; S. W. Har- 

 bor, July 14-Sept. 5. 



P. viDuus Cress. Salisbury Cove, July 13-19. 



Syrphidae. The Flower Flies 



This beautiful and almost completely beneficial family may 

 be taken generally around flowers, but there are some which 

 will have to be searched for in their particular habitat. Many 

 resemble the Hymenoptera. 



MiCRODON Meigen 



M. coNFLicTus Curr. Witch Hole Pond, July 20 ; S. W. Harbor, 



Aug. 26 (Alexander). 

 M. coTHURNATus Bigot. 'Great Clearing,' north of Sargent 



Mt., June 10. 

 M. MANiTOBENsis Curr. Bar Harbor ; S. W. Harbor, June 9-22. 

 M. OGELLARis Curr. Bar Harbor, June 9. 

 M. TRisTis Loew. Bar Harbor, June 8-21. 



VoLUCELLA Geoifroy 



V. BOMBYLANS FACIALIS var. LATERALIS Johiis. Bar Harbor ; 

 S. W. Harbor; Echo Lake, June 7-27. The larvae are 

 commensal in the nests of bumble bees. The flies closely 

 resemble the various species of bumble bees. 



