272 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



mesonotum and scutellum with deep, dense punctures, the sculpture 

 somewhat rugose; anterior margin of scutellum produced medially- 

 forming a prominent angulation; cephalic margin of propleura de- 

 fined by a carina, the latter not extending dorsally to the humeral 

 tubercle; propleura with large, contiguous punctures; mesopleura 

 with coarse, distinct punctures throughout ; metapleura glabrous, im- 

 punctate throughout, except for a few large punctures ventrally; 

 anterior margin of sides of propodeum glabrous, impunctate, the 

 remainder deeply and very coarsely reticulate; posterior face and 

 dorsum of propodeum very deeply and coarsely reticulate; tegulae 

 glabrous, impunctate, except the narrow basal, and inner lateral 

 margins setigerourly punctate. 



Abdomen ferruginous ; first segment strongly nodose ; first tergite 

 very deeply, densely and coarsely punctate: sparsely clothed with 

 long, erect, pale yellow pubescence and a thin apical fringe of pale 

 yellow pubescence; second tergite deeply, densely, strongly punctate 

 throughout, sparsely clothed with long, erect, pale yellow pubescence 

 and an apical fringe of similar pubescence; tergites 3-6 densely, 

 deeply, strongly punctate; apical fringe and sparse, long, erect 

 pubescence pale yellow ; basal area of ultimate tergite densely punc- 

 tate and with pale yellow pubescence; the pygidial area concave, 

 rugose; basal areas of integument of tergites 4, 5, and 6 somewhat 

 darker than remainder of abdomen; first sternite dark, the median 

 longitudinal carina prominent anteriorly, densely punctate, sparsely 

 clothed with long, erect, pale yellow pubescence ; second sternite with 

 large, somewhat elongate, distinct punctures throughout; apical 

 margins of sternites 3-6 densely punctate ; sternites 2-6 with sparse, 

 long, erect, pale yellow pubescence and with apical fringes of similar 

 pubescence; ultimate sternite with moderate, distinct punctures, and 

 sparse, pale yellow pubescence. 



Legs dark mahogany red, clothed with sparse, dark pubsecence; 

 apices of middle and posterior femora squarely truncate, the caudal 

 surfaces of the truncations sulcate ; calcaria pale. 



Wings dark fuliginous; cell 2nd Ri + Rj broadly truncate at the 

 apex; cell R^ practically obsolete; vein M3+4 received by cell R5 

 about one-third the distance from the base to the apex; veins r-m 

 and Up distinctly separated on vein r. 



Holofype.— Male, Cat. No. 40749, U.S.N.M., Willcox, Arizona, 

 July 31, 1909 (A. K. Fisher). 



Paratype. — Male, Oak Creek Canyon, Arizona, August (F. H. 

 Snow), in collection of University of Kansas. 



The pale pubescence of the head, and the uniform coloration of 

 the pubescence of the abdomen distinguish it from related species. 

 The genitalia are like those of obscura and are not figured. This 



