21. Polyrhachis tibialis ^HNS. B.M.

Worker. Length 2 1/4 lines.-Black: covered with a fine short slightly golden pubescent pile, the tibiae and flagellum ferruginous. Head: the basal joints of the flagellum fusco-ferruginous. Thorax: a short stout spine at each of the anterior angles, and a much longer one at the posterior angles; the thorax is convex above. The scale of the peduncle incrassate, quadrate, and with a long acute spine curving backwards and outwardly over the abdomen on each side. Abdomen globose, and having a much finer and brighter pile than the head and thorax.

Hab . Burmah.

Very like P. dives ^HNS; the thorax is however shorter, broader, and much more convex above; the spines on the metathorax are also much longer.