Catalogue of the hymenopterous insects collected at Sarawak, Borneo; Mount Ophir, Malacca; and at Singapore, by A. R. Wallace. Author Smith, F. text Journal of the Proceedings of the Linnean Society of London, Zoology 1857 2 42 88 http://antbase.org/ants/publications/2588/2588.pdf journal article 2588 D09C3FFA-7EB5-4A2D-A55E-A3229619A2A2 12. Formica fervens . F. capito abdomineque obscure rufo-piceis, thorace pedibusque pallide ferrugineis. Worker. Length 4 lines. Head nigro-piceous, thorax and legs pale ferruginous; head subopake, with the mandibles and clypeus slightly shining, the latter with scattered punctures; the flagellum pale ferruginous; the anterior margin of the clypeus slightly emarginate. Thorax more or less fuscous in front, compressed behind. Abdomen black and shining, with the apical margins of the segments narrowly testaceous; thinly sprinkled with pale hairs; the scale ovate and ferruginous. Hab. Borneo (Sarawak).