47. Polyrhachis Gagates ^HNS. Pl. IV. fig. 14. B.M.

Worker. Length 3 1/4 -3 1/2 lines.-Jet-black: head and thorax subopake; abdomen very smooth and shining. Head and thorax finely longitudinally rugose and thinly covered with fine, short, cinereous pile; the disk of the thorax flattened, the lateral margins acute; the prothorax with a stout acute spine on each side in front, the divisions of the thorax strongly marked; the posterior angles of the metathorax slightly produced, not spined. The scale of the peduncle incrassate, subquadrate, with a long, stout spine at each of its superior angles, and a short acute one outside beneath them; abdomen globose.

Hab . Port Natal.