83. Formica ruficeps.

Worker. Length 4 lines.-Black: the head and the thorax in front ferruginous; the head smooth, shining, and much wider than the thorax; the mandibles and scape black, the apex of the former ferruginous; the flagellum pale rufo-testaceous. The thorax much compressed behind; the tips of the coxae, femora and tibiae, and the tarsi ferruginous. Abdomen smooth and shining; the scale of the peduncle ovate, its apex acuminate; the legs and the apex of the abdomen with a thin short pale pubescence. Worker minor only differs in size and in having the mandibles ferruginous.

Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.)