DIPTERA. 137 



Subgenus Hercoslomus Loew. 

 H. unicolor Loew. 

 Me.— Fort Kent, Aug. 19, 1910. 



Paraclius Loew. 

 P. albinotatus Loew. 

 Vt.— Norwich, July 7, 1908. 



P. claviculatus Loew. 



Mass. — New Bedford. Conn. — . 



P. hybridus Melander. 

 Me.— Orr's Island, July 25. 



Mass. — Woods Hole, July 14-27 (Melander); Chatham, July 1; 

 Edgartown, June 29. Conn. — Woodmont, July 9 (Butrick). 



P. propinquus Wheeler. 



Mass.— Woods Hole, July 14-27 {Melander). 



P. vicinus Aldrich, 04-277. 



Me.— 7, 8, 10. July 17-27. 



Mass.— 31, 32. Conn.— 35. June 29- July 27. 



Tachytrechus Loew. 

 T. binodatus Loew. 

 Vt. — Bennington, June 24, 1915. 



T. moechus Loew. 



N. H. — Franconia (Mrs. Slosson). 



Mass. — Southbridge (Bromley). 



T. vorax Loew. 



Me.— 6. N. H.— 11, 12. Vt.— 20. July 8. 



Mass.— 23, 27, 29, 31. June 13-Sept. 29. 



Pelastoneurus Loew. 



P. abbreviatus Loew. 

 N. H.— Hampton, Aug. 8-20 (Shaw). 



Mass. — Somerville, Aug. 13 (Barber). Conn. — Woodmont, 

 July 9 (Butrick). 



P. cristatus Van Duzee, 24-105. 



N. H.— Hampton, Aug. 8, 1923 (Shaw). 



Mass. — Eastham, June 27, 1904. 



P. lamellatus Loew. 



Me.— 7, 8, 10. N. H.— 15. June 9-Sept. 12. 



Mass.— 26, 28, 29, 31. Conn.— 35. June 20-Sept. 8. 



P. lugubris Loew. 



Vt.— Woodstock, Aug. 26, 1898 (Morse). 



Mass.—. 



P. neglectus Wheeler. 



N. H.— Hampton, Aug. 15, 1908 (Shaw). 



