16. Polyrhachis cuspidatus ^HNS.

P. niger; prothorace metathoraceque medio elevatis et bispinosis; femoribus abdominisque basi ferrugineis.

Worker. Length 2 1/2 lines. Black: head subovate, not narrowed behind; the base of the scape, the apex of the flagellum, and the tips of the mandibles, ferruginous. Thorax slightly compressed; the prothorax with an elevation in the middle which terminates above in two divergent spines; there is also a similar elevation, spined above on each side, on the metathorax; the coxae, femora, and apical joints of the tarsi, ferruginous. Abdomen ferruginous at the base; the scale quadrate, deeply notched above.

Hab. Borneo (Sarawak).