DIPTERA. 33 



O. dorsalis Johnson, 09-119. 



Me. — Capens, July 14; Machias, July 25; Mt. Desert, June 11- 

 July 17. 



O. venosa Johnson, 09-120. 



Me.— 4, 7. N. H.— 11, 12, 14. Vt.— 18. June 27-July 15. 



Mass.— 23, 24, 25, 27. May 29- June 18. 



O. obscura Johnson, 09-122. 



Me.— 4, 7, 8, 10. N. H.— 11, 12, 13. Vt.— 17, 22. June 19- 



Aug. 8. 

 Mass.— 23, 27. R. I.— 33. June 18-Aug. 10. 



O. obscura var. polita Johnson, 09-122. 

 N. H.— 11, 12. July 5-20. 

 Mass.— 23, 25, 27. June 28-Aug. 8. 



Tanyptera Latreille {Xiphura Brulle). 



T. frontalis (Osten Sacken). 



N. H.— 11, 14. June 9- July 4. 



Mass.— 23, 25, 27. Conn.— 35. May 9- June 15. 



T. topazina (Osten Sacken). 



Me.— 6, 8. N. H.— 11, 14. Vt.— 21. June 5-24. 



Mass.— 23. June 8-14. 



T. fumipennis (Osten Sacken). 



N. H. — Hampton (Shaw). 



Mass.— "The Notch," South Amherst, May 27. Conn.— 



Hamden, May 25 (Champlain) ; South Meriden, May 28 (H. L. 



Johnson) . 



Ctenophora Meigen. 



C. apicata Osten Sacken. 



Me.— 4, 6, 9, 10. N. H.— 11, 15. June 28-July 30. 



Mass.— 24, 27, 32. R. I.— 33. Conn.— 35. July 12-Aug. 22. 



C. nubecula (Osten Sacken). 



Mass. — Wellesley; Dorchester, June. Conn. — Rowayton, June 

 16. 



Stygeropis Loew. 

 S. fuscipennis Loew. 



Me.— 8. Vt.— 16, 20. June 24-Aug. 18. 

 Mass.— 26, 27, 29, 30. R. I.— 33. June 21-Aug. 23. 



Longxirio Loew. 



Me.— Boothbay Harbor, July 26, 1924 (G. M. Allen). N. H.— 



White Mts. {Morrison), U. S. Nat. Mus. 

 Mass.— Savoy, July 17, 1919 {Dr. W. E. Britton). 



