432 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



the pedicel is small, oblong, or rounded; the second fuuiclar joint 

 shorter than the first, slijjhtly emarginate at base, angulat^d towards 

 one side at tip, the joints beyond the third oval-moniliform, only slightly 

 longer than thick. . 



Maxillary palpi 5-jointed. . 



Mandibles short, bifid. 



Thorax ovoid, the prothorax appearing above as a transverse ridge, 

 the sides always woolly; mesonotum smooth, without furrows; scutel- 

 lum with a single shallow fovea at base, very rarely with two small 

 shallow foveJB, and without lateral impressed lines; metathorax short, 

 bicarinated al>ove, hardly emarginate, the posterior angles not acute or 

 prominent, and always woolly or covered with a dense ai)pressed pu- 

 bescence. 



Front wings pubescent, ciliated, the submarginal vein terminating 

 in a small, triangular marginal vein before attaining one-third the 

 the length of the wing; no basal, or other nervures. 



Abdomen oblong-oval, the petiole longer than thick, fiuted', woolly 

 above and beneath ; the second segment oc('Ui)ies most of the remain- 

 ing surface, with a depression or sulcus at base above, the following 

 segments very short. 



Legs clavate, pilose, the posterior tarsi long, slender, the basal joint 

 about twice as long as the second, claws long, curved. 



The males in this genus are quite distinct from Diapria in the an- 

 tennal characters, while the females, as before remarked, are quite 

 similar and diflQcult to separate. The anteunje, however, have always 

 a 4- or 5-iointed club; the scutellum has a more shallow fovea, or two 

 small fovete at base, and is without the lateral grooved lines which are 

 always present in Diapria; the metathorax has rarely the acute promi- 

 nent ridge at base; while the abdomen is more truncate at apex and 

 less pointed than in Diapria. 



These characters, I believe, are constant and justify me in creating 

 a new genus, and, with a litth' study, the student will soqu be able to 

 distinguish them at a glance. 



As a rule the si>ecies are smaller than in Diapria, and the following 

 table shows that the genus is well rejiresented in North America: 



' • TABLE OF SPECIES. " ^ • 



■ FEMALKS. 



1. Anteiinal club 4-jointed 2 



Autenual club 5-joiuted. 

 Anteiiuae not entirely black, the club alone black or faHCous. 

 Scutellum with a single fovea at base. 



Pedicel 8hort«>r than the first funiclar joint. 

 Legs, reddish-yellow; pedicel twice a« long as thiek 



T. I'ENTAPI-ASTA, Sp. UOV. 



Legs yellow, the femora and tibiis fuscous ; pedicel not longer than thick. 



T. ZlMMEKMA^IMI, sp.uov. 



