286 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



scrobes carinate above; front with large, contiguous punctures; the 

 vertex with similar, separated punctures; genae with moderate, close 

 punctures; vertex somewhat gibbous medially between the ocelli 

 and hind margin of the head; relative widths of head and thorax, 

 5-5.75. 



Thorax black, clothed throughout with sparse, silvery gray pubes- 

 cence, except the mesonotum with very dark ferruginous, almost 

 blackish pubescence, that on the pronotum and mesonotum denser 

 than elsewhere; anterior margin of pronotum emarginate medially, 

 the face of the emargination glabrous, remainder of anterior face of 

 pronotum punctate and finely pubescent; pronotum, mesonotum, and 

 scutellum with large, coarse, confluent punctures; propleura with 

 large, contiguous punctures except a median area on the posterior 

 half with fine punctures ; anterior margin of mesopleura with small, 

 close punctures, the remainder of mesopleura with large, coarse, 

 confluent punctures; metapleura glabrous, impunctate, except for a 

 few large punctures ventrally; anterior half of sides of propodeum 

 glabrous, with a few scattered punctures ; the posterior half of sides 

 of propodeum and posterior face of propodeum coarsely, foveately 

 reticulate, the fovea on the posterior face considerably larger than 

 those on the sides; tegulae glabrous impunctate, except the cephalic 

 and inner lateral margins setigerously punctate. 



Abdomen pale ferruginous, except the first segment dark ferrugi- 

 nous, almost black, clothed throughout with sparse, erect, pale golden 

 yellow pubescence; the second to fifth segments with a thick fringe 

 of pale golden yellow pubescence at the apical margins; first tergite 

 coarsely, confluently punctate throughout; second tergite with large, 

 close, elongate punctures, the latter somewhat denser at the margins ; 

 tergites 3-6 with dense, small punctures; last tergite impunctate, 

 glabrous, without a fringe of hairs at the apical margin ; first sternite 

 punctate and with a median longitudinal carina, the latter some- 

 what more prominent anteriorly than posteriorly; second sternite 

 with a large median pit densely filled with erect hairs, and with large, 

 close punctures throughout ; sternites 3-6 with small, scattered pimc- 

 tures near the apical margin; apical sternite with small, distinct 

 punctures on the basal two-thirds, the apical third impunctate. 



Legs dark ferruginous, sparsely clothed with pale pubescence ; cal- 

 caria dark ferruginous. 



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

 apex; cell R.^ almost obsolete; vein Mg^^ received by cell R5 at a 

 point about one-fifth the distance between the base and apex; veins 

 r-m and R5 separated on vein r. 



Holotyfe. — Male, Nogales, Arizona, July 24, 1903 (Oslar), in col- 

 lection of Cornell University, No. 759.1. 



