24 U. S. NATIONAL MUSEUM BULLETIN 216 



eye; thorax and propodeum elongate, sub cylindrical, the mesocutum 

 rather broadly flattened; propodeum with dorsomedial carinae dis- 

 tinct, and extending from base to apical 0.25; dorsal surface of propo- 

 deum very finely rugulose in region of apices of dorsal carinae, and 

 elsewhere with widely separated, large, shallow or suberased punc- 

 tures; sides of propodeum with numerous, shallow, elongate punc- 

 tures; legs stout, hind femur about 3.53 times as long as deep; ab- 

 domen slender; tergite 1 slightly longer than wide, with sides finely 

 granular and with only a few, shallow punctures, the apex of central 

 area more densely punctate; remaining tergites, except on apices, 

 with numerous, unevenly distributed, rather large, distinct punctures; 

 subgenital plate with a rather deep, narrow, membranous excision; 

 sheath about 0.4 times as long as abdomen. 



Black. Pedicel more or less brownish to yellowish brown beneath; 

 flagellum yellowish to pale brownish beneath, especially at base, 

 and often more or less brown at apex ; palpi fuscous ; tegula and small 

 spot in hind angle of pronotum pale yellowish; legs reddish, with 

 front coxa usually more or less fuscous at base; hind tibia with dis- 

 tinct, fuscous subbasal and apical annuli, and with a broad, median, 

 whitish annulus that is interrupted beneath by a reddish stripe 

 extending between the fuscous annuli; hind tarsus with apices of 

 basal two segments, and the remaining segments largely or entirely, 

 reddish brown. 



Type: 9, Norman Wells, N. W. T., July 23, 1949, W. R. M. Mason 

 (Ottawa, No. 6747 in Canadian National Collection). 



Paratypes (18 cf , 469, including 9cf, 69 from type locality): From 

 Alaska (Big Delta, Birch Lake near Fairbanks, Fairbanks, King 

 Salmon on Naknek River, Nome, and Shaw Creek at Mile 289 on 

 Richardson Highway) ; Alberta (Banff) ; British Columbia (Jesmond 

 and Saanich) ; California (Hat Creek in Shasta Co., Mammoth Lake, 

 near Sonora Pass at 8,000 ft., and Willi ts); Colorado (Estes Park, 

 Glen Haven, and Steamboat Springs) ; Idaho (Bear Pass Creek in 

 Butte Co.); Massachusetts (Holhston); Michigan (Clare Co., Delta 

 Co., Huron Co., and Livingston Co.) ; Northwest Territories (Norman 

 Wells) ; Nova Scotia (Queens Co.) ; Ontario (Blackburn and Jockvale) ; 

 Oregon (Cannon Beach and Meacham) ; Quebec (Lac Mercier, 

 Nominingue, and Parke Reserve in Kamouraska Co.) ; Rhode Island 

 (Westerly) ; Saskatchewan (Prince Albert National Park) ; Utah 

 (Logan Canyon) ; and Yukon Territory (Canyon Creek and Snag) . 

 Paratypes are deposited in the following collections: Berkeley, Cam- 

 bridge, Davis, Dreisbach, Lawrence, Ottawa, St. Paul, and Townes. 



Collection dates are from May 15 at Jockvale, Ont., to August 26 

 at Parke Reserve in Kamouraska Co., Que. 



Host: Unknown. 



