23. Polyrhachis zopyrus ^HNS.

P. niger; prothorace bispinoso; petioli squamula quadrispinosa.

Worker. Length 2 3 / 4 lines. Black, with a thin cinereous silky pile. Thorax, the anterior margin transverse, with the lateral angles very acute, and slightly produced into short acute spines; the sides of the thorax flat, the disk slightly convex, with the margins acute and slightly raised; the metathorax truncate, the angles of the truncation slightly produced, forming short acute spines; the anterior tibiae more or less ferruginous within. Abdomen globose, the node of the peduncle with the superior margin transverse, the lateral angles raised into short acute teeth or spines; the sides of the node oblique outwardly, then abruptly inclined inwards to its base; at the angle thus produced is a short acute spine. (PL I. fig. 22.)

Hab. Celebes (Tondano).