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Forewing about 6.0 mm. long; as seen from above, the hind margin 

 of head broadly and deeply concave; eye with moderately dense, very 

 short pubescence ; fourth antennal segment about 1.8 as long as wide in 

 male and about 2 .2 as long as wide in female ; top of head subshining, with 

 very close, sharp, fine punctures; propleurum about 0.83 as long as 

 the mesoscutum is wide; mesoscutum smooth, subshining, with ex- 

 tremely close very fine punctures that except under higher magnifi- 

 cations appear as an even rather mat sculpture, and some indistinct 

 irregular moderately small punctures; second segment of hind tarsus 

 of male about 2.2 as long as deep, of female about 1.6 as long as deep; 

 ovipositor sheath about 0.47 as long as the forewing. 



Blackish. Flagellum tinged with brownish toward the apex; tegula, 

 front and middle legs beyond coxae, hind tarsus, and under side of 

 hind tibia light red-brown to blackish brown; abdomen blackish with 

 the second to fifth segments partly to enth'oly ferruginous, according 

 to the subspecies; ovipositor sheath entirely blackish. 



This species is transcontinental in the Canadian Zone. There are 

 two subspecies, differing in the amount of ferruginous on the abdomen. 



la. GASTERUPTION EIRBn EIRBII (Westwood) 



Foenus Kirbii Westwood, Trans. Ent. See. London, ser. 2, vol. 1, p. 219, 1851. 



Type: 9 , Hudson Bay (London). 

 Gasteruption kirbyi Hedicke, Hymenopterorum catalogus, pt. 11, p. 32, 1939. 



Emendation. 



Female: Abdomen blackish, marked with ferruginous as follows: 

 A small indistinct lateral area at apex of first tergite, apical 0.4 ± of 

 second and third tergites, and a ferruginous tinge on the apical 0.3 ± 

 of fourth tergite. 



Male: Abdomen blackish, marked with ferruginous as follows: 

 A small indistinct lateral area at apex of first tergite, apical 0.35 ± of 

 second and third tergites, apical 0.25 of fourth tergite and apical 0.15 

 of fifth tergite. 



Specimens. — Scf, 309 , from British Columbia (Fitzgerald, Robson, 

 and Seton Lake at Lillooet); Michigan (Cheboygan County and 

 Marquette) ; New Brunswick (Bathurst) ; New York (Catskills, 

 Keene Valley in Essex County, and Mount Skyhght in Essex County 

 at 4,800 to 4,920 feet) ; Nova Scotia (Baddeck) ; Ontario (Gold Rock 

 in the Rainy River district, Kearney, Mattawa, Ottawa, Simcoe, and 

 Sudbury) ; Prince Edward Island (Brackley Beach in the Canadian 

 National Park) ; Quebec (Aylmer, Fort Coulonge, and Kazubazua) ; 

 and Saskatchewan (Runciman and Waskesiu Lake). Dates of 

 collection fall mostly from June 18 to July 29. Those outside this 

 range are June 2 at Lillooet, British Columbia; June 8 at Kazubazua, 

 Quebec; June 12 at Ottawa, Ontario; and August 13 in Keene Valley, 

 Essex County, N. Y. 



