DIPTERA. 107 



Ogcodes Latreille {Oncodes of authors). 



O, borealis Cole. 



Me.— Monmouth, June 27, 1912 (Frost); Waterville, July 5. 



1905 {H itching s). N. H. — Hampton, June 27 [Shaw). 

 Mass.— Holden, June 27, 1908 (J. H. Emerton). 



O. costatus Loew. 



Me.— 6, 7, 8, 9, 10. N. H.— 11, 15. June 22-July 12. 

 Mass.— 25, 26, 27, 32. R. I.— 33. Conn.— 35. June 19- 

 Aug. 8. 



O. incultus Osten Sacken. 



Me.^, 6, 9. N. H.— 11, 15. Vt.— 17. June 4-26. 



Mass.— 26, 27, 28, 32. Conn.— 34. June 5- July 28. 



O. pallidipennis Loew. 



Me.— 8, 9. N. H.— 15. June 18-July 23. 



Mass.— 23, 24, 26, 27. Conn.— 35. June 26-Aug. 9. 



Opsebius Costa. 

 O. gagatinus Loew. 



N. H.- — -Franconia (Mrs. Slosson). 



O. pterodontinus Osten Sacken. 

 Me.— 4, 6, 9. N. H.— 11, 13, 15. July 10-Aug. 15. 

 Mass.— 24, 32. R. I.— 33. July 18-Aug. 8. 

 Parasitic on the "grass spider" (Agelena naevia). 



O. sulphuripes Loew. 



Mass.— Chester, Aug. 4; North Attleboro, July 4, 1921; Sher- 

 born, July 3, 1913 (Frost). 



Acrocera Meigen. 

 A. bimaculata Loew. 



N. H. — Jaffrey, July 18 (Miss Nina Spaulding). 

 Mass. — Southbridge, June 26 (;S. W. Bromley). 



A. bulla West wood. 



Me.— West Kennebunk, Aug. 19, 1919 (A. B. Fuller); Bailey's 



Isl., Aug. 20, 1915 (G. M. Allen). 

 Mass.— Southbridge, July 3, 1915 (S. W. Bromley). 



A. fasciata Wiedemann. 



Mass. — Waltham, from a spider, Amaurhius sylvestris (J. H. 

 Emerton); Framingham, June 9, 1915 (Frost). 



A. nigrina West wood. 



Me.— York, Sept. 4; Oquossoc, July 1, 1922. N. H.— Shirley 



Hill, June 17, 1911 (F. W. Grigg). Vt.— Bennington, June 18, 



1915. 

 Conn. — Darien, June 12, 1915. 



A. obsoleta Van der Wulp. 



Me.— Orono, Aug. 5, 1915 (A. P. Morse). 



