[3] These are small wasps, most with dark green or blue iridescence.

Their antennae have one to three anelli, five to seven funiculars and four clavomeres (including a terminal button).

The apical margin of the clypeus is bilobed, and they have a well developed occipital carina.

The metacoxa is greatly enlarged and subtriangular in cross section; the metatibia has two stout, curved spurs and the tarsal claws have large basal lamellar projections.

The metasoma is strongly sclerotized and usually has transverse rows of large pits on the tergites.