20. Ponera rugosa ^HNS. B.M.

Female. Length 3 1/4 lines.-Ferruginous; the head coarsely and deeply punctured, the punctures semi-confluent; the antennae short and thick; the flagellum clavate and pubescent; the mandibles longitudinally grooved. Thorax oblong, widest in front, the anterior margin rounded, the lateral angles acute; the metathorax truncate; the prothorax with large deep confluent punctures; the mesothorax longitudinally grooved; the scutellum and metathorax ruggedly punctured. The abdomen longitudinally grooved, the grooves on the basal segment punctured; the node of the peduncle rugged and globose: beneath, furnished with a remarkable semitransparent flattened appendage.

Hab. Borneo (Sarawak).