DIPTERA. 121 



S. scintillans (Loew). 



N. H.— Cornish, July 13; Intervale, Aug. 12 (Allen). 



S. tener (Loew). 



Me.— 7, 8. July 14-21. 



Mass.— 23, 27, 32. R. I.— 33. Conn.— 35. June 23-Aug. 26. 



S. unifasciatus (Say). 



R. I. — Buttonwoods, July 25. Conn. — Branforcl, July 5 (But- 



rick) . 



Subgenus Condylostylus Bigot, 1859. 

 (Psilopodinus Aldrich, not Bigot; see Becker, 21-251.) 



S. albicoxa (Walker). 

 Mass.— (Walker). 



S. caudatus (Wiedemann). 

 Me.— 6, 8, 10. N. H.— 11, 12, 15. July 7-25. 

 Mass.— 24, 26, 27, 28, 29. R. I.— 33. Conn.— 35. May 30- 

 Aug. 12. 



S. flavipes Aldrich, 04-284. 



Me.— Mt. Desert, July 14. N. H.— Hampton, July 1-Sept. 27 



(Shaw) . 

 Mass.— New Bedford (Hough); Blue Hill, July 16; Wellesley, 

 July 27 (Morse). 



S. inermis (Loew). 



Mass. — Lexington, July 27; Woburn, July 11; Hyannisport, 

 July 4. 



S. patibulatus (Say). 



Vt.— 16, 18, 22. June 24- July 14. 



Mass.— 23, 27, 29. R. I.— 33. Conn.— 35. May 30-July 11. 



S. scaber (Loew). 



Mass.— Auburndale, Aug. 2. Conn. — : 



S. scrobinator (Loew). 



Me.— 6, 7, 8, 10. N.H.— 12, 15. Vt.— 18,20. July 7-Aug. 19. 



Mass.— 26, 27, 29. R. I.— 33. Conn.— 35. June 17-Aug. 23. 



S. sipho (Say). 



Me.— 9. N. H.— 11. Vt.— 16. July 14-Aug. 23. 



Mass.— 24, 27, 28. R. I.— 33. Conn.— 35. June 12-Sept. 10. 



Mesorhaga Schiner. 



M. townsendii Aldrich. 

 Mass.— Ipswich, July 22, 1909. 



M. varipes Van Duzee. 

 Mass.— Eastham, June 27, 1904. 



