122 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



one carina prominent, sharp, the other ahnost obsolete ; scape coarsely 

 punctate above; first segment of flagellum distinctly shorter than 

 the second, seen from above, subequal to the second, seen from be- 

 neath; antennal scrobes carinate above; front densely, coarsely punc- 

 tate; vertex with the punctures slightly larger, close, more or less 

 confluent; genae with moderate, confluent punctures, not as coarsely 

 sculptured as the front and vertex; relative widths of head and 

 thorax, 6.75-8. 



Thorax black, clothed with sparse, long, erect, black pubescence, 

 except that on the pronotum, mesonotum, and scutellum yellow: 

 cephalic margin of pronotum distinctly emarginate, the face of the 

 emargination glabrous, impunctate; pronotum, mesonotum, and scu- 

 tellum densely, coarsely, and deeply punctate; propleura densely, 

 coarsely punctured anteriorly, posteriorly with intermixed moderate 

 and fine punctures; mesopleura with large, distinct punctures, an- 

 teriorly, elsewhere with large, dense, contiguous punctures; meta- 

 pleura glabrous, impunctate except for coarse, scattered punctures 

 ventrally; sides, posterior face, and dorsum of propodeum coarsely, 

 foveately reticulate; tegulae glabrous, impunctate, except the basal 

 and inner lateral margins setigerously punctate. 



Abdomen black, clothed with sparse, long, erect, black pubescence, 

 except that of the apical fringe of the second tergite, that on ter- 

 gites 3-6, and on basal third of last tergite, yellow; first segment 

 strongly nodose; first tergite densely, coarsely, deeply confluently 

 punctate ; second tergite with moderate, contiguous punctures on the 

 disk, dense and coarse punctures basally and laterally; tergites 3-6 

 with small, dense punctures; apical tergite rugose, with an apical 

 fringe of short, erect, black hairs ; first sternite punctured, and with a 

 prominent, longitudinal median carina, produced posteriorly into 

 a tooth; disk of second sternite very slightly concave, with sparse, 

 moderate punctures, elsewhere the second sternite with large, deep, 

 almost contiguous punctures ; sternites 3-6 with small, scattered punc- 

 tures apically ; last sternite closely punctate on the disk, the margins 

 glabrous, impunctate. 



Legs black, clothed with sparse, long, black pubescence. Calcaria 

 black. 



Wings dark fuliginous; cell 2nd Ki + R, broadly truncate at the 

 apex; cell R4 indistinct: vein M3., received by cell R5 about one- 

 fourth the distance from the base to the apex; veins r-m and R5 

 approximate on vein r. 



Holotype.— Male, Grant County, Kansas, July 27, 1911 (F. X. 

 Williams), in collection of University of Kansas. 



Paratypes.—S males, Russell County, Kansas, July 26, 1912 (F. X. 

 Williams) ; 2 males, Osborne County, Kansas, August 3, 1912 



