23. Polyrhachis laevissimus ^HNS. Pl. IV. fig. 42. B.M.

Worker. Length 2 1/4 lines.-Black, smooth and shining, with the coxae, femora and tibiae ferruginous. Head large, wider than the thorax, the latter widest in front, gradually narrowed to the apex of the metathorax; the anterior margin of the thorax rounded, the lateral angles acute, the disk very convex, the metathorax oblique. The scale of the peduncle incrassate, subquadrate, the superior margin notched in the middle, the lateral angles produced and acute. Abdomen globose.

Hab. Burmah.