Formica tropica

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 : 37

6. Formica tropica .

F. nigerrima, nitida, laevissima; thorace pubescente, postice compresso; pedibus rufo-nigris.

Worker. Length 3 1 / 4 lines. Jet black, smooth, shining, and having a faint prismatic lustre, particularly on the head / which is oblong, or subquadrate; the tips of the mandibles ferruginous. The prothorax rounded at the sides and in front; a deep constriction at the base of the metathorax, which is elevated and rounded above; the thorax has a loose long pale scanty pubescence, probably much more dense in specimens in fine condition; the legs very obscurely ferruginous, nearly black; the legs, particularly the tibiae, have a thin long loose pale pubescence. Abdomen thinly sprinkled with pale hairs; the scale of the peduncle rounded and blunt above, not much elevated. Hab. Gilolo.