260 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



Thorax slightly longer than broad, clothed with long, erect, pale 

 yellowish- white hairs, except the anterior half of mesopleura, the 

 nietapleura, and the sides and posterior face of the propodeum 

 clothed with black hairs; dorsum of thorax very coarsely, deeply, 

 and confluently punctured; junction of the thoracic notum and the 

 propodeum defined by an irregular transverse carina and scutellar 

 scale; propleura moderately punctate; anterior half of mesopleura 

 finely punctured, the posterior half coarsely punctured; metapleura 

 glabrous, irregularly punctate on the basal third; anterior half of 

 sides of propodeum glabrous, with sparse, moderate punctures; pos- 

 terior half of sides of propodeum and posterior face of propodeum 

 very coarsely and deeply reticulate. 



First abdominal tergite subsessile, glabrous, a few scattered punc- 

 tures on the disk, and the apical margin closely punctate, clothed 

 with black, erect hairs, except a few scattered pale hairs medially at 

 the apical margin; basal margin of second abdominal tergite gla- 

 brous, impunctate, remainder of tergite with moderate, close, irregu- 

 lar punctures; tergites 3-5 with moderate close punctures, the latter 

 somewhat smaller than those of the second tergite; basal margin of 

 second tergite with a few long, black, erect hairs, remainder of sec- 

 ond tergite and tergites 3-6 clothed with long, erect, pale, yellowish- 

 white hairs; pygidium very strongly longitudinally striate; carina 

 of first sternite terminating anteriorly in a prominent tooth ; second 

 sternite glabrous, with sparse, shallow punctures; apical margins of 

 sternites 3-5 very closely, confluently punctate ; sternites one and two 

 very sparsely clothed with erect, pale, yellowish-white hairs; sternites 

 2-5 with thick apical tvimics of pale, yellowish-white hairs. 



Legs very dark red or black; middle and hind femora squarely 

 truncate at the apex, the face of the outer lobe of the truncation 

 sulcate; coxae, trochanters, femora and tibiae above clothed with 

 sparse, pale, yellowish-white hairs; tibiae beneath and tarsi clothed 



with black hairs. 



Holotype.— Female, Cat. No. 40717, U.S.N.M., Phoenix, Arizona, 



July 25, 1917 (W. D. Pierce). 



Payati/pes.— Female, Phoenix, Arizona, June 20, 1913 (E. E. Rus- 

 sell), 5 females, Baboquivaria Mountains, Arizona (F. H. Snow); 

 female, Tucson, Arizona, August 24, 1922; female, Tucson, June 28, 

 1924 (A. A. Nichol) ; 2 females, Glendale, Arizona, August 12, 1907 

 (E. S. G. Titus) ; female, Tempe, Arizona, August 5, 1917; 2 females, 

 Envir de Guadalajara, Estat de Jalisco, Mexico, 1901 (M. Diguet) ; 

 3 females, between San Jose de Cabo and Triunfo, California, 1911. 

 Paratypes in collections of American Museum of Natural History, 

 University of Minnesota, University of Kansas, University of Ari- 

 zona, Cornell University, Utah* Agricultural College, State Ento- 

 mologist of Arizona, and the author. 



