. - !!»(l BIOLOGICAL sritvr.Y OF 



T. ipiforme Fab, Bar Harbor: Green Mt.: Long Pond; 



Eden; Sec, 28, June 9-July iV). 

 T. bombylans Fal). Bar Harbor, Juno 15. 

 T. excentricum Harr. Bar Harbor: Witch Hole Pond, June 



8-13. 

 T. raiFASCiATA Robt. One specimen taken on Spirea, Eden, 



July 12, '37. 

 T. vkmshm Will. Bar Harbor: Salisbury Cove, June 9. 

 T. tespiforme Linn. Corfield, July 10-11. Scarce. 



svritta St. Fargeau and Serrille 



S. mpiens Linn. Bar Harbor: Tremont; Laboratory: Sta 

 tion P408, June 27-Aug. 23. 



Tropidia Meigen 



T. quadbata Say. Bar Harbor: S. W. Harbor. June 11- 

 July 25. 



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. 



sf.khomvia Meigen 



s. bifasciata Will. Echo Lake. June 17-July 12. 

 S. ohrysotoxoides Macq. Bar Harbor: Echo Lake: S. W. 

 Harbor, June 9-Sept. 8. 



S. miutakis Walk. S. W. Harbor; Bar Harbor: Echo Lake. 

 June 22-Sept. 8. 



EiUSTAUS Latreille 



E. arbustortjm Linn. Common, June 15-Sept. 6. 



E. BASTARDl Macq. S. W. Harbor: Salisbury Cove: Bar 

 Harbor. June 22-Sept. 9. Appears just before the middle 

 of June when Nymphaea advena blooms, and is found on 

 various (lowers around the edges of ponds until the cold 

 days in September. Common, but not numerous. 



