166 FAUNA OF NEW ENGLAND. 



M. obscurum (Say). 



Me.— 8, 9. N. H.— 11, 14, 15. Vt.— 17, 19. June 8-Aug. 7. 



Mass.— 25, 26, 27. R. I.— 33. Conn.— 35. May 30-Oct. 19. 



M. confusum Curran. 



Me.— Mt. Katahdin, Aug. 11 (7. H. Blake)] Southwest Harbor, 



June 16; Eastport, July 15. N. H.— Mt. Washington, 4000 



ft., July 16. Vt.— Killington Peak, Aug. 28. 



Leucozona Schiner. 



L. lucorum var. americana Curran, 23-38. 



Me.— Mt. Desert, June 9, 1920; Bailey IsL, July 18 {Allen). 



N. H.— Mt. Washington, 4000 ft.; Mt. Kearsarge, 3270 ft., 



July 2. 



Didea Macquart. 



D. fasciata var. fuscipes Loew. 



Me.— 6, 8. N. H.— 11, 14. June 12-19. 



Mass.— 27, 29. Conn.— 35. May 20-Sept. 25. 



Syrphus Fabricius. 

 S. arcuatus Fallen. 



Me.— 1, 6, 7, 8. N. H.— 11, 12. Vt.— 17. June 21-Sept. 13. 

 Mass.— 27, 29. Conn.— 34, 35. July 13-Oct. 16. 



S. perplexus Osburn, 10-55. 



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



Mass.— 23, 25, 26, 28, 32. Conn.— 35. May 5-Oct. 16. 



S. johnsoni Curran, 24-79. 



N. B..—Jaffrey, June 15-18, 1917. 



S. vinelandi Curran. 



Mass.— Winchester, Aug. 20, 1922. R. I.— Kingston, May 9, 

 1908 (Barlow). 



S. disjectus Williston. 



Me.— 8. N. H.— 11, 15. July 22-Sept. 3. 



Mass.— 23, 25, 27. R. I.— 33. Conn.— 34. May-Sept. 1. 



S. nitens Zetterstedt. 



Me. — Orono, Julj^ 23- July 11, larvae feeding on the ''willow 



grove plant-louse," Pterocomma flocculosa Weed (Metcalf, 16- 



242); ''Narrows," Mt. Desert, Aug. 13. 



S. wiedemanni Johnson, 19-32 (S. americanus Wiedemann, 



1830, not Swederus, 1787). 

 Me.— 3, 4, 8, 10. N. H.— 11, 15. Vt.— 16, 19, 20, 21. June 9- 



Aug. 28. 

 Mass.— 27, 29, 31, 32. R. I. — 33. Conn.— 35. June 24- 



Oct. 16. 



