16. Polyrhachis laevigatus ^HNS.

Worker. Length 2 1/2 lines.-Black, smooth and shining: the antennae with the flagellum thickened at the apex. Thorax: the anterior angles acute, the disk convex, the metathorax with two long, acute, divergent spines directed backwards; the coxae and femora ferruginous, the anterior pairs obscure. Abdomen globose; the scale of the petiole with a long curved spine on each side, directed backwards to the curve of the abdomen.

Hab. Malacca. (Coll. W. W. Saunders, Esq.)