15. Polyrhachis laevigatus ^HNS.

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.