432 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



the pedicel is small, oblong, or rounded; tlie second funiclar joint 

 shorter than the first, slightly emarginate at base, augulated towards 

 one side at tip, the joints bej^oud the third oval-moniliforni, 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; niesonotuni smooth, without furrows; scutel- 

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

 shallow fovea', and without lateral impressed lines; metathorax short, 

 bicarinated above, hardly emarginate, the posterior angles not acute or 

 prominent, and always woolly or covered with a dense appressed j^u- 

 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, fluted, woolly 

 above ami beneath; the second segment occupies 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 difficult to separate. The antennre, however, have always 

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

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

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

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

 less pointed than in l^iapria. 



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

 a new genus, ami, Avith a little study, the student will soon be able to 

 distinguish them at a glance. 



As a rule the species are smaller than in Diapria, and the following 

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



TABLE OF SPECIES. 



FEMALES. 



1. Anteimal club 4-jointed 2 



Anteunal club 5-jointed. 

 AnteuujB not entirely black, the club alone black or futsi-ous, 

 Scutellum with .i single fovea at base. 



Pedicel shorter than the lirst funiclar joint. 



Legs, reddish-yellow; jiodicel twice as long as thick 



T. rENTATLASTA, sp. nOV. 



Legs yellow, the femora and tibia; fuscous ; i)cdicel not longer than thick. 



T. ZiM.MEKMAXNI, sp.UOV. 



