7. Formica virulens ^HNS.

F. capite, thorace pedibusque rufo-ferrugi-neis; abdomine nigro; squama oblongo-ovata.

Worker. Length 4 lines. Head, antennae, thorax, and legs rufo-ferru-ginous; the head very large, much wider than the abdomen, emarginate behind, and rounding at the sides to the tips of the mandibles; the latter triangular, stout, and longitudinally striated, their inner margin dentate. The thorax compressed behind. Abdomen shining, black, with the margins of the segments ciliated with pale hairs; the scale of the petiole oblong-ovate. Hab. Celebes (Tondano).