3. Polyrhachis marginatus ^HNS.

P. niger; antennis, palpis pedibusque ferrugineis; thoracis marginibus recurvis, metathorace petiolique squamula bidentatus.

Worker. Length 2 1 / 2 lines. Black; the antennae and legs ferruginous; the head and thorax rugose; the prothorax transverse, its anterior margin slightly curved, with the lateral angles produced forwards and very acute; the thorax narrowed to the metathorax, which is armed with two divergent acute spines. Abdomen velvety black and globose; the scale of the petiole produced laterally into long, bent, acute spines, which curve backwards to the shape of the abdomen.

Hab. Aru.