Catalogue of the hymenopterous insects collected at Sarawak, Borneo; Mount Ophir, Malacca; and at Singapore, by A. R. Wallace. Author Smith, F. text Journal of the Proceedings of the Linnean Society of London, Zoology 1857 2 42 88 http://antbase.org/ants/publications/2588/2588.pdf journal article 2588 D09C3FFA-7EB5-4A2D-A55E-A3229619A2A2 15. Polyrhachis laevigatus . P. niger, lavis, nitidus; metathorace spinis duabus longis acutis retrorsum directis; abdominis squama spinis duabus curvatis armata; coxis femorumque basi rufis. Worker. Length 2 1/2 lines. Black, smooth and shining: the flagellum thickened towards the apex. Thorax: the anterior angles acute; the disk not flattened; the metathorax with two long, acute, divergent spines, directed backwards; the scale with a long curved spine on each side, directed to the curve of the abdomen; the coxae and femora ferruginous, the anterior pair obscure. Abdomen globose, smooth and shining. Hab. Malacca. I have only seen a single specimen of this species: the clavate antennae appear to indicate its belonging to a different genus.