DIPTERA. 165 



Platychirus St. Fargeau et Serville. 

 P. albimanus (Fabricius). 

 N. H. — Mt. Washington {Mrs. Slosson). 



P. chaetopodus Williston. 



Me. — Mt. Desert, June 8; Ft. Kent, July 5; Van Buren, 



July 7. N. H.— Mt. Washington, July 8; Jaffrey, June 7. 

 Mass. — North Saugus, Aug. 11. 



P. hyperboreus (Staeger). 



Me.— 9, 10. N. H.— 11, 14, 15. Vt.— 20. June 1-July 24. 



Mass.— 27, 29, 32. Conn.— 35. May 16-Aug. 20. 



P. peltatus (Meigen). 



Me.— 6, 8. N. H.— 11, 14. July 2-Aug. 21. 



Mass.— 23, 27. R. I.— 33. Conn.— 35. May 30-Aug. 13. 



P. quadratus (Say). 



Me.— 6, 8, 10. N. H.— 11, 15. Vt.— 20. May 28-Aug. 7. 



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

 19-Sept. 2. 



P. perpallidus Verrall. 



Me.— 1, 2, 6, 8. N. H.— . June 13-Aug. 3. 



Mass.— 26. Aug. 29. 



P. scutatus Meigen. 



Me. — Orono, about Spiraea infested with Aphis spercacola (Met- 

 calf, 17-163). 



P. immarginatus Zetterstedt. 

 Me.— Bar Harbor, July 25 (Metcalf). 



P. discimanus Loew. 



Me.—. 



P. angustatus Zetterstedt. 



Me.—. 



P. varipes Curran, 23-65. 

 Me.— Ft. Kent, Aug. 17, 1910. 



Melanostoma Schiner. 

 M. angustatum WilHston. 



Me. — Mt. Desert, June 14. N, H. — Mt. Washington. Vt.— 

 Mt. Equinox. 



M. montivagum Johnson, 16-78. 



N. H.— Mt. Washington, 3000 to 4000 ft., and near the Glen 

 House, July 6, 1914. 



M. mellinum (Linne). 



Me.— 4, 8, 10. N. H.— 11, 13, 14, 15. Vt.— 20. Mav 21- 



Aug. 31. 

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



Apr. 25-Sept. 7. 



