17- Formica tenuipes ^HNS.

F. castaneo-rufa laevis nitida; thorace ovato; alis hyalinis; squama quadrata supra emarginata. Female. Length 4 lines. Reddish-brown: mandibles stout, and armed with five stout black teeth; antennae pale rufo-testaceous. Thorax ovate, smooth and shining; wings hyaline, the nervures pale testaceous; legs pale rufo-testaceous, with the femora much compressed, flattened; the scale of the abdomen quadrate, emarginate above. Abdomen ovate, smooth and shining.

Hab. Borneo (Sarawak).