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 74. Formica diligens , Female. Length 9 lines.-Dark rufo-piceous; the antennae, mandibles, thorax at the sides and beneath, the metathorax and legs ferruginous. In form closely resembling Formica ligniperda ; the head shining; the antennae, the anterior margin of the face and clypeus, and the mandibles ferruginous. The wings subhyaline, the nervures and tegulae pale ferruginous. Abdomen shining, pale ferruginous beneath; the scale of the peduncle subquadrate, slightly emarginate its entire width above. Hab. Malacca. (Coll. W. W. Saunders, Esq.)