DIPTERA. 127 



N. lateralis (Say). 

 N. H.— 11, 15. 



Mass.— 27, 28, 29, 30. R. I.— 33. Coxx.— 35. June 15- 

 Aug. 9. 



N. dorsalis Van Duzee, 14-434. 

 N. H.— Cornish, July 13. 



Chrysotimus Loew. 



C. delicatus Loew. 



Me.— Salisbury- Cove, Mt. Desert, July 14, 1923. 



Xanthochlorus Loew. 

 X. helvinus Loew. 



N. H.— White Mts. Vt.— Brattleboro, July 15. 

 Mass.— Brookline, July 4; Chester, Aug. 9. 



Thinophilus Wahlberg. 



T. ochrifacies Van Duzee, 24-101. 



Mass. — Cohasset, Sept. 8; Chatham, July 1; Eastham, June 27; 

 Edgartown, June 29. Conn. — Rowayton, Aug. 5, 1908. 



T. prasinus Johnson, 21-13. 

 N. H. — Hampton, June 27 (Shaw). 



Mass.— Plum Isl., July 17 (Morse); Chatham, June 30, 1904; 

 Edgartown, June 29, 1912. 



T. viridifacies Van Duzee, 24-102, 



Mass. — Edgartown, June 29, 1912; East Gloucester, June 20, 

 1924. 



Diostracus Loew. 



D. prasinus Loew. 



Vt.— Bolton Mt., July 15 (Bryant). 

 Mass. — Chester, Aug. 4. 



Hypocharassus Mik. 



H. pruinosus (Wheeler). 



Mass. — Cohasset, July 5 (Bryant); Chatham, June 30; Woods 

 Hole; Edgartown, June 29. R. I. — Buttonwoods, July 25. 



Medeterus Fischer von Waldheim. 



M. maurus Wheeler. 



N. B..—Mt. Washington. Vt.— Jay Peak, 4018 ft., July 14, 



1891 (Morse). 

 Mass. — Auburndale, June 16. 



M. modestus Van Duzee, 14-440. 



Me. — Bar Harbor, June 11. N. H. — Mt. Washington, July 7. 



Vt. — Burlington, June 24. 

 Mass. — Auburndale, June 16. 



