Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. Author Smith, F. text 1858 British Museum London http://antbase.org/ants/publications/8127/8127.pdf book 8127 C86CFDBF-61D9-48EE-9C2E-325FC0462B10 84. Formica fervens . Worker. Length 4 lines.-Head and abdomen black, obscurely rufo-piceous; thorax and legs pale ferruginous. The head subopake, with the clypeus and mandibles shining; the flagellum pale ferruginous; the anterior margin of the clypeus slightly emarginate. Thorax usually more or less fuscous in front, compressed behind. Abdomen shining, the apical margins of the segments narrowly testaceous; the scale of the peduncle ovate and ferruginous. Hab . Borneo (Sarawak). (Coll. W. W. Saunders, Esq.)