DIPTERA. 179 



T. alternans Loew. 



Me.— 4, 6, 7,8. N.H.— 11, 14. Vt.— 17,21. June lo-July 25. 



Mass.— 26, 27. Conn.— 34, 35. May 30-July 17. 



T. excentricum Harris. 



Me.— 7, 8, 9. N. H.— 11, 14. Vt.— 17. June 9-July 20. 



Mass.— 23 (Mt. Greylock). June 15. 



T. venustum WilKston. 



Me.— Saddleback Mt., 4000 ft., July 18, 1916 (Metcalf); Bar 

 Harbor and Salisbury Cove, June 9. N. H. — Mt. Washington 



{Mrs. Slosson). 



Mass.—. 



T. bombylans (Fabrieius). 



Me.— 5, 8, 9. N. H.— 11, 14, 15. Vt.— 18, 21. June 9- 



July 9. 

 Mass.— 26, 27, 32. R. I.— 33. Conn.— 34, 35. May 30- 



Aug. 7. 



T. obscunim Loew. 



Me.— 9. N. H.— 11, 14. Vt.— 18. June 16-July 7. 



Mass.— 23, 24, 27. Conn.— 34, 35. May 30-June 19. 



Ceriodes Rondani {Ceria Fabrieius, not Scopoli, 1763). 



C. abbreviata (Loew). 



Conn. — New Haven {Williston). 



C. proxima Curran, 24-228. 



Me. — Metagamon, July 4, 1901. Vt. — Bennington, June 18- 

 21, 1915. 



C. willistoni (Kahl). 



Mass.— Forest Hills, Boston, June 4, 1913 (P. W. Whiting). 



Conopidae. 



Conops Linne. 

 C. brachyrhynchus Macquart. 



Mass. — Hadley, July 7, 1909. Conn. — New Haven, July 6, 

 1913 (W. E. Britton). 



C. sylvosus Williston. 



N. H.— 11, 13, 15. June 26-Aug. 2. 



Mass.— 24, 27. Conn.— 34, 35. July 3-Aug. 21. 



C. xanthopareus Williston. 



Mass. — . Conn. — New Haven, Aug. 9; Sachem Head, Aug. 1. 



Physocephala Schiner. 



P. furcillata (Williston). 



Me.— 3, 4, 6, 7, 8, 9. N. H.— 11, 12, 13, 14. Vt.— 17, 19, 20. 



July 4-Aug. 30. 

 Mass.— 23, 25. Conn.— 34. July 5-Aug. 24. 



