THE MOUNT DESERT REGION 383 



Pipunculus Latreille 



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



P. affinis Cross. Station F349 and F375. A scarce form. 



P. ateb Meig. Bar Harbor; Echo Lake, July 12. 



P. atlanticus Hough. Bar Harbor, June 7. 



P. caudatus Cress. Bar Harbor ; Upper Hadloek Pond ; S. 



W. Harbor, June 9-25. 

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

 P. minor Cress. Salisbury Cove, July 15. 

 P. nigripes Loew. Salisbury Cove; Green Mt., July 24-25. 

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

 P. scoparius Cress. Salisbury Cove; Echo Lake; S. \V. 



Harbor, July 14-Sept. 5. 

 P. subopacus industrius Knab. Middle Road on Spirea 



Aug. 6. 



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. Har- 

 bor, Aug. 26 (Alexander). 



M. coTHURNATus Bigot. "Great Clearing," north of Sar- 

 gent Mt., June 10. 



M. manitobexsis Curr. Bar Harbor; S. W. Harbor, June 

 9-22. 



M. ocellaris Curr. Bar Harbor, June 9. 



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



Volucella Geoffroy 



V. bombylans facialis var. lateralis Johns. 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. Type locality. 



