12. Polyrhachis Hector ^HNS.

Worker. Length 4 lines.-Opake-black; delicately shagreened: the thorax armed with two long acute divergent spines in front, and two slightly divergent ones on the metathorax; the legs without spines or pubescence, the calcaria black; the disk of the thorax convex. Abdomen with an obscure ferruginous tinge; the scale of the petiole quadrate, with two long divergent spines above which curve backwards.

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