5. Ponera rugosa ^HNS.

P. ferruginea rude rugosa; capite thoraceque profunde punctatis; abdomine rude sulcato et punctato.

Female. Length 3 1/4 lines. Ferruginous; the head covered with coarse deep punctures, 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 curved, 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 rugged and subglobose, beneath, furnished with a remarkable flattened semitransparent appendage. Hab. Borneo (Sarawak).