DIPTERA. 113 



T. flavicincta Loew. 



Me.— 6, 8. N. H.— 11, 14. Vt.— 19. June 28-Sept. 8. 



Mass.— 27. R. I.— 33. July 20-Aug. 9. 



T. frontalis Say. 



Me.^, 8. N. H.— 11, 14, 15. Vt.— 16, 19, 20. June 17- 



Aug. 1. 

 Mass.— 23, 24, 25, 26, 27, 28, 29. R. I.— 33. Conn.— 35. 



May 23-Aug. 5. 



T. strigipes Loew. 



Me.— 4, 7. N. H.— 11. Vt.— 16, 20. June 24-July 25. 



SCENOPINIDAE. 



Scenopinus LatreiUe. The Window-flies. 



S. fenestralis (Linne). 



Me.— 6, 7, 8. N. H.— 11, 12, 15. May 5-Aug. 15. 



Mass.— 27, 29, 32. R. I.— 33. Conn.— 35. June 4-Aug. 10. 



S. glabrifrons Meigen. 

 N. H.— Glen House, July 18. 



Mass. — Boston; Brookline; Cambridge, June 4-Aug. 10. Conn. — 

 New Haven, June 5. 



Mydaidae. 



Mydas Fabricius. 

 M. clavatus Drury. 

 Mass. — Sherborn; Southbridge ; Chieopee; Amherst, July 16- 



Aug. 8. R. I. — Rockville, Aug. 13 (Barlow). Conn. — Lyme; 



New Haven; Farmington; Brookfield, July 2- Aug. 1. 



AsiLiDAE. The Robber-flies. 



Leptogaster Meigen. 

 L. badius Loew. 



Me.— 6, 9. N. H.— 11, 13, 15. June 27-July 21. 

 Mass.— 24, 27, 28, 31. Conn.— 34, 35. June 25-July 28. 



L. testacea Loew. 



Me.— 9, 10. Vt.— 21. June 19- July 25. 



Mass.— 26, 27, 32. Conn.— 35. July 8-Aug. 9. 



L. flavillaceus Loew. 



Me.— 6, 9. N. H.— 11. Vt.— 21. June 19-July 1. 



Mass.— 28. Conn.— 35. July 4-Aug. 10. 



L. flavipes Loew. 



Me.— 6, 9. N. H.— 12, 15. Vt.— 20, 21. July 14-July 15, 



Mass.— 23, 24, 26, 27, 28. Conn.— 35. June 15-July 15. 



L. loewi Banks, 14-133. 



Me.— 2, 6. N. H.— 12. Vt.— 21. July 4-Aug. 24. 



Mass.— 23, 26, 27, 29. Conn.— 35. June 16-July 13. 



