402 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



last two, or the fifth aiul sixth, being wider than hmg, tlie chib joints are 

 slightly pedicellate, transverse, increasing in size, the last very large 

 cone-shaped. Mesonotal furrows deep and broad. Scutellura with a 

 punctate frenum and two broad fovejc at base. Metathorax rugoso- 

 punctate, pubescent. Wings hyaline, i)ubescent, fringed. Abdomen 

 smooth, polished, impunctured, the petiole longitudinally striated. 



Habitat, — Washington, D. C. 



Type in Coll. Ashniead. 



Described from a single specimen, taken by myself along the canal 

 at Georgetown. 



TROPIDOPSIS Ashiu., gen. nov. 

 (Type T. clavata Ashm.) 



Head subglobose, the face in the female flat, with delicate side keels; 

 ocelli 3, triangularly arranged; eyes large, rounded. 



Antennae in 9 12-jointed, terminating in a large, abrupt, 3-jointed 

 club, the funicle slender; in $ 14- jointed, filiform, longer than the body, 

 the flagellar Joints, except the first and last, elliptic-oval, pilose. 



Mandibles short, bifid. 



Thorax as in Lo.mtropa, the metathorax emarginated posteriorly, the 

 angles a little prominent, centrally with an acute carina. 



Front wings pubescent, the submarginal nervure reaching the costa 

 at about the middle, the marginal nervure about twice as long as thick, 

 the stigmal vein not developed, the basal nervure distinct. 



Abdomen petiolate, oblong-oval, the second segment very long. 



Legs clavate. 



Allied to Loxotropa, but readily distinguished by the much longer 

 submarginal nervure, presence of facial keels, and the ditterence in 

 the male autennai. 



Tropidopsis clavata, sp. nov. 



(PI. XVII, Fig. 2, $ ; a, <? antenna.) 



9 . Length, 1.4""". Brownish-red or ferruginous, smooth, polished; 

 antennse, except club and legs, i)ale, or yellowish. AntennjB 12-jointed, 

 terminating in an abrupt 3-jointed black club, the fir.st two joints of 

 which are quadrate, the last oblong; funicle 7-jointed, slender, tlie first 

 joint about twi<*e as long as the second, the following not huiger than 

 thick, the last two tu" three slightly tranverse; pedicel obconic, much 

 larger and stouter than the first funiclar joint. Head globose, the face 

 flat with delicate side keels. Eyes large, rounded. Scutellum with a 

 single fovea at base. Metanotum emarginate, the angles a little promi- ^ 

 nent. Abdomen oblong-oval, the i)etiole a little longer than thick, 

 pubescent. Wings hyaline, fringed, the submarginal vein reaching the 

 costa at about the middh; of the wing, ending in a subtriangular 

 marginal vein; basal nervure straight. 



$ . Length, 1.3" "". Antenna) longer than the bodyj 14-jointed, flli- 



