4. Polyrhachis defensus ^HNS.

P. niger; capito thoraceque minute verrucatis, thorace spinis duabus longis antice, duabus postice, armato; abdomine opaco ferrugineo-rufo.

Worker. Length 3 1/2 lines. Head and thorax black, and coarsely shagreened; the thorax armed with two long stout spines at the angles of the prothorax, and two similar ones at the posterior angles of the metathorax; the scale of the abdomen with two long stout spines diverging and curved backwards. Abdomen globose, of a dull opake rusty-red.

Hab. Singapore. Java.

Specimens from Java, in the British Museum, have the abdomen black.