12. Formica scrutator ^HNS.

F. nigerrima, mandibulis tarsorumque articulo apicali pallide ferrugineis, thorace medio profunde coarctata.

Worker. Length 1 1 / 2 — 2 lines. Shining black; the mandibles pale, ferruginous, with their inner margins finely denticulate; the eyes placed rather forwards on the sides of the head, the latter emarginate behind. Thorax deeply strangulated in the middle; the metathorax elevated and obliquely truncate behind. Abdomen ovate; the scale of the petiole sub-incrassate, with its margin rounded above; the insect very thinly covered with a fine cinereous pile.

Hab. Aru.