18. Polyrhachis equinus ^HNS.

P. niger nitidus; thorace supra deplanato, metathorace et pedunculo bispinosis, pedibus pallide ferrugineis.

Worker. Length 3 lines. Black; head shining and delicately rugulose; the palpi pale rufo-testaceous. Thorax: flattened above, the margins acutely edged; the sides longitudinally delicately striated; the prothorax, above, slightly concave, and shaped like a horse-shoe; the metathorax is also slightly concave, with the posterior angles acute and elevated; the metathorax smooth and shining behind; the legs rufo-testaceous. Abdomen: smooth, shining and subglobose; the scale elevated, with two short teeth above, the sides oblique; the scale narrowing to its base. Hab. Sarawak.