1. Ponera rugosa, Smith, Cat. Hym. Ins. Proc. Linn. Soc. ii. 66. 5.
Hab. Aru. Borneo.
2. Ponera sculpturata. P. nitida nigra; capite, thorace abdominisque segmentis primo et secundo profundè striatis, nodo spinis duabus acutis armato; pedibus abdomineque apice ferrugineis.
Worker. Length 5 lines. Black and shiny, the legs obscurely ferruginous as well as the mandibles; the head strongly and evenly striated longitudinally. The prothorax with a circular striation above; behind, the thorax is compressed, the sides being obliquely striated, the striæ uniting and crossing the central ridge of the thorax. The node of the petiole and basal segment of the abdomen with a curved striation, the second segment longitudinally striated and depressed at its base, which is smooth and shining; the basal half of the third segment is longitudinally striated.
Hab. Aru.
This species is at first sight very like the P. geometrica from Singapore; but the striation of the abdomen alone will serve to distinguish it.
3. Ponera parallela. P. nigra, opaca; antennis, mandibulis, pedibus abdominisque apice ferrugineis.
Worker. Length 3¼ lines. Opake black; the antennæ thick and scarcely as long as the thorax, their apex and the mandibles bright ferruginous; the legs somewhat obscure ferruginous, with the articulations much brighter; the head a little wider than the thorax and subovate; the thorax, node of the petiole, and the abdomen of nearly equal width, the abdomen being slightly the widest; the node of the petiole nearly quadrate; the apical margin of the first segment and base of the second slightly depressed.
Hab. Aru.
4. Ponera quadridentata. P. atro-fusca; antennis, facie anticè, antennis, mandibulis, tibiis tarsisque ferrugineis; alis subhyalinis.