4 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.61. 



DOLICHOPUS LONGIMANUS Loew. 



Dolichopus longimanus Loew, Neue Beitriige. No, 8. p. 14, 1S61 ; Smiths. 

 Misc. Colls., No. 171, p. 3S, 1S61. — Van Duzee, Cole, and Aldrich, BulL 

 116, U. S. Nat. Miis., p. 195, 1921. 



Five specimens, Anchorage and Fairbanks, Alaska, June 12 to 

 July 2. Described from English River, Canada, and reported from 

 Alaska by Coquillett in 1900; it occurs in the Canadian zone of 

 Ontario and the eastern part of the United States, and even south 

 to Virginia, but has not been reported from the western United 

 States. 



DOLICHOPUS NUDUS Loew. 



Dolichopus nudus Loew, Smiths. ISIisc. Colls., No. 171, p. 41. 1S64. — Va.x 

 Duzee, Cole, and Aldrich, Bull. 116, U. S. Nat. Mus., p. 201, 1921. 



Nineteen specimens, from Hurricane, Camp 327, and Healy, 

 Alaska, July 7 to 13. Not definitely recognized since its description. 

 The single type male, from " Fort Resolution, Hudson's Bay Terri- 

 tory," has been entirely destroyed but the wings; hence the new 

 material is very important. Loew mentions as one character, " Hind 

 tibiae stout but not exactly thickened, upon the first half of the hind 

 side without hairs," This proves to be a decisive character (in the 

 male), the bare spot being on what I would call the inner side, ex- 

 tending to the middle. Loew's description is ample, and the species 

 is correctly placed in the analytical table of Bulletin 110, page 15. 



DOLICHOPUS NIGRICORNIS Meigen. 



Dolichopus niyriconiis Meigen, Syst. Beschr., vol, 4, p. 82, 1824. — Becker, 



Nova Acta, vol. 102, p. 148, 1920. 

 Dolichopus discifer Stannius, Isis. vol. 1, p. 57, 1831. — Van Duzee. Cole, 



and ALDracH, Bull. 116, U. S. Nat, Mus., p. 202, 1921. 



One male, one female, Anchorage, Alaska, June 16. Described 

 from northern Europe; Frey reports it occurring all through Fin- 

 land. Reported from Quebec and Ontario, only a few localities 

 south of the Canadian border (Vermont, New York, Wisconsin) ; 

 has been previously reported from Alaska. 



DOLICHOPUS BOREUS Van Duzee, Cole, and Aldrich. 



Dolichopus horeus Van Duzee, Cole, and Aldrich, Bull. 116. U. S. Nat. 



Mus., p. 204, 192L 

 fDolichopus discimanvs Wahlbeeg, Kongl. Yet. Akad. Forhandl.. vol. 8, 



p. 301.— Zetterstedt, Dipt. Scand., vol. 12, p. 4626, 1855. 



Three males, Anchorage, Alaska, June 13 and July 21, Described 

 from Ungava Bay, Labrador. There is little doubt that horeus is 

 a synonym of dischnwius Wahlberg, but I have not seen European 



