488 U. S. NATIONAL MUSEUM BULLETIN 216 



Female: Front wing 7.5 to 13.3 mm. long; flagellum with about 46 

 segments, its first segment about 1.28 as long as second; head about 

 1.09 as wide across temples as across eyes, the temples long and 

 strongly flaring, to give the head a bell-shaped appearance from above; 

 punctures on temple rather small, separated by about 4.0 their diam- 

 eter; thorax about 2.60 as long as high; posterodorsal 0.3 ± of pronotum 

 with medium-sized punctures that are separated by about 2.5 their 

 diameter; trough of pronotum with weak short transverse ridges that 

 are stronger near epomia and posteroventrally; mesoscutal punctures 

 small, moderately sharp, separated by about 4 times their diameter; 

 mesepimeron with moderately dense hairs on its upper 0.65±, the 

 rest bare or with sparse hairs; metapleurum with moderately large, 

 rather weak, subadjacent punctures that are more or less obscured 

 by irregular wrinkling; petiolar area only about 0.31 as long as com- 

 bined areola and basal area; propodeal teeth very broad and short, 

 their bases almost meeting on midline, their length equal to about 

 0.4 their basal width; hairs in first lateral area sparse, their sockets 

 separated by about 1.5 the length of the hairs; hind femur about 2.1 

 as long as deep, its upper 0.45 ± with moderate sized, rather weak, 

 close punctures, the rest with very sparse punctures that are separated 

 by about six times their diameter; second segment of middle tarsus 

 about 1.85 as long as deep; fifth segment of hind tarsus about 1.0 as 

 loDg as second; second tergite weakly mat, its basal 0.4 ± rugulose, 

 its punctures rather small and weak, separated by about 3 times their 

 diameter; ovipositor sheath about 1.85 as long as front wing. 



Black. Labrum and palpi light brown; tegula fulvous; legs pale 

 fulvous, the hind tarsus, fifth segment of front and middle tarsi, and 

 more or less of extreme apex of hind femur fuscous; hind tibia some- 

 what infuscate apically; wings with a faint yellowish brown tinge. 



The female is distinct in its black abdomen, pale fulvous legs, 

 strongly flaring temples, sparsely punctate lower half of hind femur, 

 and short petiolar area. Its closest relative seems to be the Japanese 

 0. rufum. 



Specimens (105c? 1 , 1039): From Alberta (McMurray); British 

 Columbia (Robson); Colorado (Steamboat Springs); Connecticut 

 (Stonington); District of Columbia; Maine (Casco); Maryland (near 

 Cumberland and Plummers Island); Massachusetts (Forest Hdls and 

 Petersham); Michigan (Ann Arbor, Bay Co., Brevort, Carp Lake in 

 Emmet Co., Crawford Co., Douglas Lake in Cheboygan Co., Gladwin 

 Co., Gogebic Co., Iron Co., Kent Co., Lake City, Livingston Co., 

 Luce Co., Marquette Co., Midland Co., Osceola Co., Roscommon 

 Co., Rudyard, Sanilac Co., and Schoolcraft Co.) ; Minnesota (Bemidji, 

 Hawley in Clay Co., Itasca Park, Lake Itasca, Lutsen, Rice Co., and 

 Washington Co.) ; New Hampshire (Bretton Woods, Franconia, and 



