86 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



The description of the male is as follows : 



Male. — Head and thorax black, abdomen red; length, 11 mm. 

 Head black, clothed with recumbent griseous pubescence and sparse, 

 erect dark hairs; mandibles tridentate at the apex; clypeus bluntly 

 bidentate medially at the apical margin, moderately confluently punc- 

 tate, clothed with long, dark, erect hairs ; scape clothed with mixed 

 pale and dark coarse hairs; first joint of flagellum very slightly 

 shorter than the second, apparently equal in length ; antennal scrobes 

 carinate above ; front, vertex and genae with large, shallow, more or 

 less confluent punctures ; relative widths of head and thorax 7.5-8.5. 



Thorax black; pronotum with large, deep, confluent punctures, 

 clothed with recumbent and erect griseous pubescence; mesothorax 

 similarly punctured but clothed with recumbent black pubescence; 

 scutellum with large, deep, more or less confluent punctures, clothed 

 with erect, griseous pubescence; metathorax clothed with erect, pale 

 griseous pubescence; propleura with moderate shallow, confluent 

 punctures, clothed with sparse, griseous pubescence ; mesopleura with 

 large, deep, more or less confluent punctures, clothed with sparse 

 griseous pubescence; metapleura glabrous with a few, scattered, large 

 punctures, especially on the ventral half ; sides and posterior face of 

 propodeum coarsely reticulate; tegulae glabrous, punctured at the 

 basal and inner lateral margins, clothed with sparse, griseous 

 pubescence. 



Abdomen red; first segment subnodose; first tergite with large, 

 deep more or less confluent punctures throughout, clothed with 

 sparse, erect, dark hairs, and a thin apical fringe of fulvous pub- 

 escence; second tergite with large, confluent punctures throughout, 

 clothed with long, recumbent, fulvous pubescence; tergites 2-5 with 

 moderate, very close punctures, clothed with long, erect, fulvous 

 pubescence; last tergite very broad, lateral and apical margins re- 

 flexed, coarsely rugose; first sternite with a distinct median carina, 

 produced anteriorly into a distinct tooth ; second sternite with large, 

 shallow, confluent punctures throughout; sternites 3-6 with close 

 punctures; apical margins of sternites 2-6 with a thin fringe of 

 fulvous pubescence ; last sternite depressed at the base, with moderate 

 punctures throughout. 



Legs very dark red, clothed with sparse, pale pubescence ; posterior 

 tibiae very large, slightly arcuate, the ventral surface very broad, 

 flat, and glabrous, the dorsal surface rounded, scabrous. 



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

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

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

 widely separated on vein r. 



