Worker. Length 3 1/2 lines.-Black, elongate, smooth and shining: the mandibles, clypeus, antennae and legs rufo-testaceous; apex of the abdomen pale rufo-testaceous. Head oblongovate; the clypeus with a sharp carina down the middle, the scape more or less fuscous above, the base and apex pale; the posterior margin of the head emarginate. Thorax elongate, narrowed or compressed in the middle, the apex emarginate, the lateral angles of the emargination., acute or subspinose; the apical joints of the tarsi pale. Abdomen rounded at the base, strangulated at the apex of the first segment, and tapering to an acute point at the apex; the sting exserted, half the length of the abdomen; the node of the peduncle subquadrate, rounded in front and truncate behind; the insect thinly sprinkled with short pale hairs.
Hab. Brazil; Rio (Constancia)
