164 U. S. NATIONAL MUSEUM BULLETIN 216 part 3 



rated by about their diameter; metapleuriim of male subpolished, with 

 very close, sharp punctures, toward the hind coxa usually with some 

 fine wrinkling; metapleurum of female with close, strong punctures 

 that are irregular and partly obscured by some rather fine but rather 

 strong wrinlding; propodeum with moderately coarse, strong punc- 

 tures that are more or less obscured among fine, irregular wrinlding; 

 apical carina of propodeum weak, its median 0.4 lacking, but its 

 position often traced by stronger wrinlding; postpetiole subpolished 

 or weakly mat, in male with moderate-sized punctures that are 

 separated by about 0.7 their diameter, in female with fine punctures 

 that are separated by about 2.0 their diameter; second tergite weakly 

 mat, its punctures in male moderate sized, weak, separated by about 

 0.5 their diameter, its punctures in female small, moderately strong, 

 separated by about 0.7 their diameter. 



Male: Black. Side of face, orbital mark at top of eye, cheek, 

 clypeus, most of mandible, incomplete band on flagellum covering 

 2-4 segments, tegula, hind corner of pronotum, often a short obscure 

 stripe at upper end of epomia, often collar and lower edge of pronotum, 

 usually a spot on scutellum and postscutellum, rarely the mesepi- 

 meron, rarely an area behind base of hind wing, and rarely some of 

 apical part of propodeum, white; palpi white, light brown apically; 

 front and middle coxae and trochanters mostly white but with 

 some ferruginous and infuscate areas; front and middle legs beyond 

 trochanters ferruginous, their tarsi brown apically; hind coxa, tro- 

 chanters, femur, and tibia ferruginous, the tibia a little darker and 

 faintly infuscate at base and apex; first and last segments of hind 

 tarsus fuscous or brown, the rest white; abdomen ferruginous. 



Female: Black. Cheek, orbital mark on vertex, usually facial 

 orbit, usually clypeus, tegula, hind corner of pronotum, collar, usu- 

 ally upper and lower margins of pronotum and subtegular ridge, 

 usually scutellum and postscutellum, often some of apical part of 

 propodeum, and sometimes extensive thoracic markings, white or 

 whitish; palpi white or stramineous, pale brown apically; scape and 

 pedicel light brown or fulvous, fuscous above; flagellum with an 

 incomplete white band that covers about 3 segments; front and 

 middle coxae and trochanters entirely white or more or less fulvous; 

 front and middle legs beyond trochanters fulvous, their fifth tarsal 

 segments brown; hind leg fulvoferruginous, its coxa sometimes with 

 a white blotch above, its tarsus a little darkened but with the median 

 segments usually paler; abdomen ferruginous. 



In specimens from southern California the ground color of the 

 thorax may be mostly ferruginous rather than black and the whitish 

 thoracic markings very extensive. In these the propleurum and 

 entire pronotum, central mark on mesoscutum, marks along notauli 



