THE MOUNT DESERT REGION 195 



Sericomyia Meigen 



S. BiFASciATA Will. Eclio Lake, June IT-Jnl}" 12. 



S. CHRYsoToxoiDEs Macq. Bar Harbor; Echo Lake; S. W. 



Harbor, June 9-Sept. 8. 

 S. MiLiTARis Walk. S. W. Harbor; Bar Harbor; Echo Lake, 



June 22-Sept. 8. 



Eristalis Latreille 



E. ARBUSTORUM Lhin. Common, June 15-Sept. 6. 



E. coMPACTus Walk. Bar Harbor; Echo Lake, June 13-17. 



E. DiMiDiATus Wied. Bar Harbor; S. W. Harbor; Salisbury 

 Cove, June 11-Sept. 6. 



E. NEMORUM Linn. Bar Harbor ; Salisbury Cove, July 24. 



E. TENAX Linn. 'Drone fly.' Common, July 10-Sept. 22. 

 The larva is known as the 'rat-tailed larva' and lives in 

 putrid water. 



E. SAXORUM Wied. Witch Hole Pond, June 13. 



E. TRANsvERsus Wied. Bar Harbor; S. W. Harbor; Salisbury 

 Cove, June 15-Sept. 6. 



E. BASTARDii Macq. S. W. Harbor; Salisbury Cove; Bar Har- 

 bor, June 22-Sept. 9. 



E. FLAViPEs Walk. Bar Harbor; S. W. Harbor, June 11- 

 July 25. 



Mallota Meigen 



M. posTicATA Fab. Bar Harbor, June 8-July 27. 



Merodon Meigen 



M. EQUESTRis Fab. Narcissus fly. Bar Harbor, July 25, 1916 

 (Metcalf); July 19, 1919 (C. W. J.). Introduced. The 

 larva lives in Narcissus and other bulbs. 



Helophilus Meigen 



H. BOREALis Staeg. {H. glacialis Loew). Narrows, June 9- 



Aug. 13. 

 H. LATiFRONs Loew. Bar Harbor, July 19. 

 H. FASciATus Walk. {H. s'lmUis Macq., not Curt.). Witch Hole 



Pond; Bar Harbor; S. W. Harbor, June 13-Sept. 6. 



