No. 2312. NEW NORTH AMERICAN HYMENOPTERA—ROHWER. 231 



on the propodeum ruf o-ferruginous ; two small spots on the pronotum, 

 tegulae, two spots on the scutellum, and the postscutellum yellow; 

 abdomen ferruginous with the sutures black; the apical margin of 

 the second, third, and fourth segments yellow; the bands on the second 

 and third segments much broader laterally; legs ruf o-ferruginous 

 the four anterior tibiae, posterior femora beneath and the posterior 

 tibiae yellowish; body densely clothed with long gray hair; wings 

 violaceous, venation black; stigma ferruginous. 



Paratype females indicate that the species may vary as follows: 

 Black of the head entirely replaced by ferruginous ; there may be two 

 yellow marks in the superior orbits to the middle of the vertex; the 

 black of the mesothorax may be largely ferruginous; when the black 

 is replaced by ferruginous, the yellow spots are somewhat larger. 



What may be the male of this species is closely allied to venator 

 Cresson, but the first tergite is red and the hind basitarsis is straight. 

 In these two characters it is similar to mimica Cresson, but differs 

 from that species in the longer apical joint of the antennae. 



Male. — Length, 17 mm. Anterior margin of the clypeus with broad, 

 hairy lobes, medianly tridentate; front and face shining, with dis- 

 tinct separate punctures; third antennal joint distinctly longer than 

 the fourth; apical joint of the antenna longer than the preceding, 

 strongly concave beneath, truncate apically; the sculpture of the 

 thorax is similar to that of the female, except that the propodeal 

 inclosure in entirely smooth and polished medianly, but with the 

 large scattered punctures laterally; pygidium truncate apically, 

 strongly margined laterally, and about one-fourth broader at the 

 base than at the apex. Black; face and clypeus, two spots on the 

 pronotum, tegulae, metanotum, bands on the second, third, fourth, 

 fifth, and sixth tergites (those on the second and third much broader 

 laterally) yellow; basal three joints of the antennae and first tergite 

 ruf o-f erroginous ; legs ruf o-ferruginous ; intermediate coxae and 

 trochanters beneath, the posterior coxae and trochanters, base of 

 the femora beneath, all of the tibiae beneath and most of the tarsi 

 yellow; body densely clothed with long gray hair; wings subhyaline, 

 the apical margin strongly dusky, venation dark brown costa and 

 stigma ferruginous. 



Type locality. — Near St. Louis, Missouri. The type is under Phil 

 Rau's No. 3304; the allotype (male) in under his No. 3259; two 

 paratypes (females) from Lake view, Kansas are under Phil Rau, No. 

 190. All the material was collected by Phil Rau, for whom the species 

 is named. 



Type.— Cat. No. 21610, U.S.N.M. 



