20 U. S. NATIONAL MUSEUM BULLETIN 216 



pale reddish beneath, and sometimes entirely reddish at apex; palpi 

 pale yellowish; hind angle of pronotum yellowish; tegula pale yellow- 

 ish; metapleurum varying from black to mostly dark reddish; ab- 

 dominal tergites usually with bases and apices more or less rufopiceous; 

 legs mostly reddish; apex of front coxa aid all trochanters often pale 

 yellowish; hind tibia with a broad, median, whitish annulus, and 

 with narrow subbasal and broader apical fuscous annuli, the latter 

 i eddish beneath; hind tarsus reddish brown to dark brown, with 

 segments 1-3 broadly yellowish at bases. 



Female: Front wing 6.0 to 8.0 mm. long; antenna with 25 to 28 

 segments; cheek about 0.33 breadth of mandible at base; mandible 

 weakly coriaceous on basal 0.5; temple, as seen from above, weakly 

 rounded on anterior 0.5 and strongly rounded behind; thorax mod- 

 erately stout; propodeum as in male; legs stout; hind femur 3.5 times 

 as long as deep ; segment 5 of tarsus very strongly swollen ; claws very 

 large and stout; abdomen rather stout; tergite 1 about as long as wide, 

 with sides and central region beyond basal declivity more or less 

 granular and with scattered punctures; tergite 2 distinctly wider than 

 long, and deeply, rather densely punctate except on apex; tergite 3 

 shorter and broader, but otherwise as in tergite 2; tergites 4 and 5 

 with punctures indistinct except in basal region; tergites 6 and 7 with 

 very shallow, indistinct punctures; sternites large and broad, with 

 coarse, aciculate punctures; subgenital plate with a rather small, 

 basal, membranous excision; sheath about 0.4 times as long as 

 abdomen. 



Black, often varying to rufopiceous or reddish, especially on face, 

 lower part of head, side of thorax, propodeum, and abdomen. Scape 

 reddish to reddish brown beneath; pedicel more or less yellowish 

 beneath; flagellum yellowish brown to reddish brown beneath, be- 

 coming entirely reddish at apex; clypeus, more or less of mandible, 

 and sometimes cheek, rufopiceous varying to dark reddish; palpi 

 brownish; tegula and hind angle of pronotum pale yellowish; stigma 

 brownish black, with base and apex narrowly sordid yellowish; wing 

 tinged with brownish; mesopleurum usually more or less rufopiceous, 

 especially in region near base of middle coxa, a id sometimes rather 

 narrowly rufopiceous along anterior and posterior margins; meta- 

 pleurum in greater part, or entirely, rufopiceous or reddish; legs as 

 in male; abdomen more or less rufopiceous, tergites sometimes with 

 distinct, reddish markings. 



A male and female from Great Bend, Kansas, represent an extreme 

 color variation. Both specimens, except for the blackish head and the 

 usual markings on the legs, are almost entirely red. 



Type: 9, Long Point (Lake Erie), Ont., June 21, 1939, G. S. Walley 

 (Ottawa, No. 6746 in Canadian National Collection.) 



