334 BIOLOGICAL SURVEY OF 



Pyrophaena Schiner 



P. GRANDiTARsus Foerster, S. W. Harbor, July 15. Newport 



Meadow on Solidago, Sept. 4. 

 P. ROSARUM Fab. Bar Harbor; S. W. Harbor; Salisbury 



Cove, June 13-Aug. 9. 



Platycheirus St. Fargeau and Serville 



P. CHAETOPODus Will. Bar Harbor, June 8. 



P. HYPERBOREUs Staeg". Salisbury Cove, July 25. 



P. iMMARGiNATus Zett. S. W. Harbor ; Bar Harbor (Metcalf), 



June 15- July 25. 

 P. PELTATus Meig. Bar Harbor, June 16-July 17. 

 P. QUADRATus Say. 'Narrows'; Salisbury Cove, June 9-July 



27. " . 



Melanostoma Schiner 



M. ANGUSTATUM Will. Bar Harbor, June 14. 

 M. CONFUSUM Curr. S. W. Harbor, June 16. 

 M. MELLiNUM Linn. Common, June 22-July 27. 

 M. OBSCURUM Say. Bar Harbor ; 'Narrows' ; Long Pond, June 

 21-Sept. 7. 



Cartosyrphus Bigot 



C. PALLiPES Loew. Common, June 26-July 30. 



C. sLossoisTAE Shau. 'Great Clearing,' north of Sargent Mt., 



June 10. 

 C. TRisTis Loew. Common, June 12-Sept. 6. 



Cheilosia Meigen 



C. ORiLLiAENsis Curr. S. W. Harbor, June 21. 



PiPiZA Fallen 



P. FEMORALis Loew. Bar Harbor, June 8. 

 P. NiGROPiLosA Will. Bar Harbor, June 8. 

 P. QLTADRIMACULATA Pauz. Bar Harbor ; Echo Lake, June 13- 



27. 

 P. sp. Bred from galls of Pemphigus rliois on sumac {Rhus), 



Aug., 1938. 



