Polyrhachis nudatus

Smith, F., 1860, Descriptions of new species of hymenopterous insects collected by Mr. A. R. Wallace at Celebes. (Part Formicidae), Journal of the Proceedings of the Linnean Society of London, Zoology 5, pp. 57-93 : 71

5. Polyrhachis nudatus .

P. capite thoraceque opacis ; abdomine nitido, lievissimo ; thorace spinis duabus longis acutis antice et postice armato ; squama spinis duabus longis curvatis.

Worker. Length 4 lines. Black ; the head finely rugose ; the mandibles stout and shining ; the palpi fuscous. Thorax oblong, with two very stout conical spines in front, which curve obliquely outwards ; the metathorax has also two similar spines, but rather longer, which diverge and are bent slightly - downwards ; the thorax rounded above; the legs shining black. The peduncle of the abdomen incrassate, quadrate, and armed above with two stout, long, curved, acute spines, which are directed backwards, and curve to the shape of the base of the abdomen.

Hab. Makassar.