Formica virulens

Smith, F., 1861, Catalogue of hymenopterous insects collected by Mr. A. R. Wallace in the Islands of Ceram, Celebes, Ternate, and Gilolo., Journal of the Proceedings of the Linnean Society of London, Zoology 6, pp. 36-48 : 38

7. Formica virulens .

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).