_Gen. Char._: BODY nearly glabrous and coarsely punctured. HEAD subglobose, rather wider than the thorax; _ocelli_ in a triangle in the centre of the vertex, which is broad and slightly convex; _antennæ_ short, subclavate, geniculated, the scape nearly one-half the length of the flagellum and more robust; the first and second joint of the flagellum subclavate, the basal one the longest and most robust, the remainder short, subequal, and gradually enlarging to the apical one, which is obtuse and as long as the basal joint; _face_ flat, slightly convex between the insertion of the antennæ; _cheeks_ large and protuberant; _clypeus_ concave, projecting, lobated in front, where it is slightly emarginate in the centre; _labrum_ elongate at its articulation, broader than beyond, and from this expansion immediately and abruptly contracting, from the inner angles of the contraction waving to about three-fourths its length, whence it is produced into an equal truncated oblong; _mandibles_ bidentate, external tooth acute, inner one obtuse; _cibarial apparatus_ long; the _tongue_ twice the length of the labium, narrowest at its base and obtuse at the extremity, and clothed with short setæ; _paraglossæ_ very short, coadunate at the base and acuminate; _labial palpi_ two-thirds the length of the tongue, with the three first joints membranous and flat, conterminous and tapering to their extremity, the first joint about one-half the length of the second, the third twice the length of the fourth, which is clavate and articulated within the apex of the third; _maxillæ_ subhastate and acuminate, as long as the tongue; _maxillary palpi_ very short, rather stout, the joints subequal and the terminal one acute. THORAX oval, convex; _prothorax_ inconspicuous _wing-scales_ rather large; _scutellum_ transversely quadrate, convex; _post-scutellum_ transverse, linear; _metathorax_ gradually declining, with a glabrous triangular space at its base; _wings_ with two submarginal cells nearly equal and a third commenced; the second receives both the recurrent nervures, the first beyond its commencement and the second before its termination; _legs_ shortish, subsetose, the anterior spurs short, broad, and emarginate at the apex; the _posterior plantæ_ with a compact dense brush within; _claw-joint_ long; _claws_ simple. ABDOMEN longer than head and thorax, subclavate, convex above, retuse at the base, and the apical segment obtuse at its extremity, the venter flat, its segments clothed from the second with dense parallel brushes of longish hair for the conveyance of pollen.