DIPTERA. 167 



S. latifasciatus Macquart (S. abbreviatus Williston). 

 N. H.— 15. May 13. 



Mass.— 23, 24, 26, 27, 28, 29, 30, 32. R. I.— 33. Conn.— 35. 

 Apr. 23-Sept. 20. 



S. knabi Shannon, 16-200. 

 Me. — Orono. 



S. ribesii Linne. 



Me.^, 6, 7, 8. N. H.— 11, 13, 14, 15. Vt.— 19, 21. June 15- 



Sept. 19. 

 Mass.— 23, 25, 26, 27, 29, 32. Conn.— 34, 35. May 25-Sept. 



22. 



S. ribesii var. vittafrons Shannon, 16-202. 

 Me.— 4, 8. N. H.— 14. June 8- July 16. 

 Mass.— 27, 32. Conn.— 34. July 14-Sept. 19. 



S. rectus Osten Sacken. 



Me.— 6, 8. N. H.— 11, 14. June 2-Aug. 25. 



Mass.— 23, 26, 27, 31. Conn.— 34. June 13-Oct. 4. 



S. torvus Osten Sacken. 



Me.— 3, 6, 8, 9, 10. N. H.— 11, 13, 15. Vt.— 17. Apr. 10- 



Sept. 25. 

 Mass.— 23, 24, 25, 26, 27, 28, 29, 32. Conn.— 34, 35. May 19- 



Oct. 16. 



S. vitripennis Meigen. 



Me.— 4, 7, 10. N. H.— 11. Vt.— 17. June 18-July 25. 



Mass.— 23, 27, 31. Conn.— 34. Apr. 22-Aug. 5. 



S. laxa (Osten Sacken). 



Me.— 3, 4, 7, 8, 9. N. H.— 11, 14. Vt.— 17. June 21-Sept. 13. 



Mass.— 27. June 12. 



S. amalopis Osten Sacken. 



Me.— 8, 9. N. H.— 11, 14, 15. Vt.— 21. May 20- July 12. 



Mass.— 23, 25, 28, 32. Conn.— 35. May 5-Sept. 7. 



S. laticaudus Curran. 



Me.— Orono, June 4 (Parshleij). N. H.— Mt. Washington, 4000 



ft., July 6; Glen House, July 7; Mt. Monadnock, July 12. 

 Mass.— Chester, May 28, 1912. 



S. limatus Hine. 



Me.— Bar Harbor, June 13, 1921. 



S. venustus Meigen. 



Me.— Mt. Desert, June 9. N. H.— Mt. Washington, 5000 ft.; 

 Mt. Kearsarge, 3270 ft., July 2 (il/orse) ; Jaffrey, June 4. 



S. emarginatus (Say). 

 Me.— 8. N. H.— 11. 

 Mass.— 23, 25, 27, 28. R. I.— 33. Coxn.— . 



