5. Polyrhachis constructor ^HNS.

P. niger; thorace ovato, spinis duabus minutis antice armato; abdominis squamula spinis duabus armata.

Female. Length 3 1/2 lines. Black: finely rugose; the palpi pale testaceous; the mandibles obscurely rufo-piceous; the apex of the antennae pale rufo-testaceous. Thorax: the anterior angles of the prothorax acute; the metathorax not toothed; the apex truncate, the truncation finely rugose; wings subhyaline, faintly yellow; the nervures pale testaceous. Abdomen globose; the scale quadrate, with two very stout, short, curved spines above; the insect is very thinly covered with a fine short silky ashy pile, most apparent on the abdomen.

Hab. Borneo (Sarawak).