DIPTERA. 91 



B. albipennis Say. 



Me.— 6, 9. N. H.— 11, 15. Vt.— 21. May 31-June 11. 

 Mass.— 25, 27, 28, 32. R. I.— 33. Conn.— 35. Mayl7-June3. 



B. basilis Loew. 



Me.— Mt. Desert, June 11-24. N. H.— Glen House, June 13-16. 



B. femoratus Wiedemann. 



Me.— 9. N. H.— 11, 15. May 11-June 13. 



Mass.— 23, 24, 27. R. I.— 33. Conn.— 35. Apr. 28- June 15. 



B. fraternus Loew. 



Me.— 6 (Orono). 



Mass.— 24, 26, 27. R. I.— 33. Conn.— 35. May 13-June 27. 



B. fumipennis Walker. 



N. H.— Mt. Washington {Mrs. Slosson). Vt.— Bolton Mt., 

 Aug. 30 (Bryant); Killington Peak, Aug. 23, 1898 (Morse). 



B. longipes Loew. 



Me.— 6, 8. N. H.— 11, 15. Vt.— 19. Aug. 28-Oct. 14. 



Mass.— 24, 26, 27, 32. R. I.— 33. Conn.— 35. Sept. 20- 

 Oct. 27. 



B. slossonae Cockerell, 09-174 (B. gracilis Walker, 1848, not 



Unger, 1841). 

 Me. — . N. H. — Passaconaway, Sept. 12, 1912 (Cushman). 

 Mass.— Mt. Greylock, 3000 ft., Oct. 9, 1920 (G. C. Wheeler); 



Cheshire, Oct. 2 (Beecroft). 



B. variabilis Loew. 



Me.— 5, 6, 8, 9. N. H.— 11. Vt.— 21. June 5-July 7. 



Mass.— 23 (summit Mt. Greylock, June 15, 1906). 



B. xanthopus Wiedemann. 



Me.— 6, 9. N. H.— 11, 14. 15. Vt.— 19. May 17-June 19. 



Mass.— 25, 27. May 12-June 1. 



B. vestitus Walker. 



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



Dilophus Meigen. 



D. breviceps Loew. 



N. H. — Glen House, June 18; Mt. Washington (Dimmock). 



Vt. — Manchester, June 6; Bennington, June 22. 

 Mass.— Mt. Greylock, 3000 ft., June 15; North Adams, June 20. 



D. sectus McAtee, 21-22. 



Me.— Ft. Kent, Aug. 17; Monmouth, June 16 (Frost). N. H.— 

 Franconia (Mrs. Slosson) ; Bretton Woods, June 27. 



D. spinipes Say (D. dimidiatus Loew). 

 Conn.— West Haven, Oct. 2 (Britton) . 



