123. Formica nigriceps ^HNS. B.M.

Worker. Length 5 1/4 lines.-Pale ferruginous, with the head black, the face anteriorly and the mandibles ferruginous. The clypeus slightly produced, and widely emarginate, or rather, notched in front, its extreme anterior margin black; the antennae ferruginous. Thorax rounded in front, and gradually narrowed and compressed towards the metathorax; the scale ovate, its margin rounded; the legs elongate. Abdomen ovate; the insect thinly sprinkled with erect ferruginous hairs.

Hab. Australia.