47. Myrmica trachylissa ^HNS. B.M.

Female. Length 3 lines.-Ferruginous: the head and thorax coarsely rugose, longitudinally grooved, the grooves with deep, large punctures; the head very large, larger than the thorax, the latter nearly globose; the verge of the truncation of the metathorax widely emarginate, the lateral angles produced, forming acute teeth. Abdomen very smooth and shining, the nodes of the peduncle smooth, shining and subglobose.

Hab. Borneo. (Coll. A. R. Wallace.)