18 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



near base; black, grayish sericeous outwardly; mandibles varying 

 from entirely black to black with a median ferruginous tinge. 



Thorax: Prothorax rather smooth, its sides almost without oblique 

 rugosities in front of the pro thoracic lobe; mesonotum minutely, not 

 closely punctured, scutellum with sparse, minute punctures and faint 

 longitudinal rugosities; postscutellum finely, transversely rugose; pro- 

 podeal disk finely, evenly rugose, the rugosities in front running 

 strongly backward and outward, but on the posterior half, more 

 directly outward; hardly meeting on the middle line they leave a dis- 

 tinct line there, though usually with no ridge; no punctures evident 

 on the disk; end of propodeum with a fovea and a depressed line 

 from tip of disk to the petiolar articulation; at each side of this are 

 oblique rugosities and punctures; sometimes there is a silvery pubes- 

 cent spot on each side at base of petiole; sides of propodeum irregu- 

 larly rugose and punctured; metapleuron with rather coarse, oblique 

 punctures and sometimes traces of rugosity ; mesopleuron similar. 



Abdomen: Petiole almost as long as hind coxa and trochanter 

 together; abdominal segments dark, glistening ferruginous but often 

 tinged darker, appearing to be shaded with black. 



Wings: Hyaline, oftgn with a yellowish shade; veins brown; stigma 

 almost yellow. 



Legs: Coxae black; the fore coxa with a tooth on its inner face 

 close to the trochantal articulation; trochanters black or more or 

 less ferruginous; femora, tibiae and tarsi ferruginous, often pale; leg 

 hairs and spines pale ferruginous; claws ferruginous; pulvilli well 

 developed. 



Male. — Here described for the first time. 



Head, thorax, petiole, and parts of the abdomen and legs black; 

 remainder ferruginous; head and thorax quite thickly clothed with 

 long, quite erect, slender, white hairs; wmgs hyaline with dark veins. 



Head: Clypeus extended some distance below the eyes and reflexed 

 forward below a line joining the nearest points of the eyes; central 

 half of its lower margin transverse, slightly, broadly emarginate; its 

 side margins nearly at right angles to the central part; surface 

 densely covered with silvery pubescence ; sides of frons similarly pu- 

 bescent well up toward level of anterior ocellus; a median depressed 

 line from between antennae to anterior ocellus; antennae black or 

 piceous near base, sericeous outwardly; mandibles black or piceous. 



Thorax: Pro- and mesonotum rather sparsely punctured, the sides 

 of the former very weakly rugose in front of the pro thoracic lobe; 

 thoracic and propodeal markings as in the female; pubescence at 

 base of petiole often absent. 



Abdomen: Petiole black, its basal half somewhat punctured and 

 bearing white hairs; about as long as hind coxa and trochanter 

 together; first abdominal segment more or less black above and 



