216 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



pubescence; abdomen ferruginous, the apical segments black, the 

 disk of the second tergite pale yellow ; apical fringes of tergites 5-6. 

 and sternites 2-4 gray; second sternite with a small, median pit 

 densely filled with hairs; legs dark ferrugino'us, clothed with pale 

 hairs. Length, 9 mm. 



Head black, sparsely clothed with erect and appressed grayish 

 pubescence; mandibles acute at the apex, bidentate within near the 

 apex; clypeus bidentate medially on the apical margin, the disk 

 densely, confluently punctate ; base of mandibles and clypeus sparsely 

 clothed with grayish pubescence; scape bicarinate beneath, closely 

 punctate above; first segment of flagellum about two-thirds the 

 length of the second; antennal scrobes inconspicuously carinate 

 above; front coarsely confluently punctate; vertex with large, 

 shallow, sparse punctures, not nearly as coarsely sculptured as the 

 front; genae with moderate, shallow punctures; relative widths of 

 head and thorax, 5-5.5. 



Thorax black, clothed with sparse, erect and appressed, silvery 

 gray pubescence, except that on the mesonotum very dark ferrugi- 

 nous, almost black; the pubescence on the pro- and mesonotum more 

 dense than on other parts of the thorax ; anterior face of pronotum 

 emarginate medially, the face of the emargination glabrous, im- 

 punctate, remainder of anterior face of pronotum punctate and 

 pubescent; pronotum, mesonotum, and scutellum with large, close 

 punctures throughout, denser on the mesonotum and scutellum than 

 on the pronotum; the propleura strongly and closely punctured 

 anteriorly, with sparse large punctures and fine punctures intermixed 

 posteriorly; mesopleura with sparse, large, shallow punctures, the 

 latter more dense medially than at the margins ; metapleura glabrous, 

 impunctate except for a few large punctures ventrally; sides and 

 posterior face of propodeiim coarsely, foveately reticulate through- 

 out, the fovea rather deep; tegulae glabrous, impunctate except for 

 a few setigerous punctures at the basal and inner lateral margins. 



Abdominal segments 1-5 ferruginous, the disk of the second tergite 

 pale j^ellow; apical abdominal segment blackish; tergites 1-2 with 

 sparse, erect, grayish pubescence; tergites 2-4 and sternites 5-6 with 

 an apical fringe of black hairs; tergites 5-6 and sternites 2-4 with 

 apical fringes of silvery gray hairs; first tergite coarsely, confluently 

 punctate throughout ; second tergite with contiguous, large, deep, and 

 elongate punctures, except those near the apical margin smaller and 

 shallow ; tergites 3-6 with small close punctures ; pygidial area some- 

 what longitudinally rugose, without an apical fringe of hairs; first 

 sternite punctate and with a median longitudinal carina, the latter 

 not more prominent anteriorly than posteriorly ; punctures of second 

 sternite large, deep, elongate, and close, except medially and basally 



