194 BIOLOGICAL SUKVEY OF 



ToxoMEBUS Macquart 



T. GEMiNATus Say. S. W. Harbor; Bar Harbor, June 21- 



July 17. 

 T. MARGiNATus Say. Bar Harbor; 'Narrows,' July 18-27. 



Sphaerophoria St. Fargeau and Serville 



S. MENTHASTRi Liiiii. Commoii, June 21-July 24. 

 S. NovAEANGLiAE Jolius. Upper Hacllock Pond; Echo Lake, 

 June 10-July 12. 



Sphegina Meigeii 



S. ELAviMANA Mall. Eclio Lake; Bar Harbor, June 17- 



Aug. 10. 

 S. PETioLATA Coq. S. W. Harbor ; Echo Lake; Bar Harbor, 



June 16- July 27. 



Neoascia Williston 



N. GLOBOSA Walk, Bar Harbor, Aug. 10. . 



Ehingia Scopoli 



R. NASiCA Say. Bar Harbor; S. W. Harbor; Narrows, June 

 21-Aug. 13. 



Hammerschmidtia Shummel 



H. FERRUGiNEA Fall. Bar Harbor, June 11-17. 



Brachyopa Meigen 



B. DivERSA Johns. Bar Harbor, June 8, 1921. 



Volucella Geoffroy 



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

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

 mensal in the nests of bumble bees. The flies closely re- 

 semble the various species of bumble bees. 



CoNDiDEA Coquillett 



C. LATA Coq. Foot of Pickett Mt., June 21. On flower of the 

 Viburnum. 



C. sEXFAsciATA Walk. South of Manset; S. W. Harbor, June 

 16, 1921. 



