3. Odontomachus tyrannicus ^HNS.

0. ferrugineus, laevis nitidus; thorace oblongo, metathorace transversus striata; abdominis pedun-culo unispinoso.

Worker. Length 4 lines to the tips of the inaudibles. Ferruginous, very smooth and shining; the head widest at the insertion of the eyes, more than usually so; the usual deep depressions between the eyes and the prominence at the sides of which the antennae are inserted very smooth without the faintest striation, the prominence slightly striated longitudinally; the head deeply emarginate behind; the mandibles finely serrated on their inner margins, and terminating in two stout teeth, which form a fork abruptly bent inwards. The antennae and legs of a paler colour than the body; the metathorax transversely striated, the mesothorax above longitudinally so; the spine on the node of the peduncle of the abdomen short and acute. (Pl. I. fig. 4.)

Hab. Celebes.