87. Formica exasperata ^HNS.

Worker. Length 5. 1/2 lines.-Head, thorax, and scale of the peduncle, blood-red, the abdomen black; a dark stain in front of the anterior stemma, and usually a second at the insertion of the antennae; these stains sometimes obsolete; the mandibles black, stout, punctured and strongly toothed; the head much wider than the thorax and deeply emarginate behind. Thorax compressed behind, usually more or less stained at the sides; the tibiae and tarsi more or less fuscous. Abdomen with the apical margins of the segments more or less rufo-piceous; the scale of the peduncle ovate and entire; a thin pale reddish pubescence on the head, thorax and legs.

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