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 7. Crematogaster difformis , B.M. Worker. Length 2 1/4 lines.-Black: the head twice as wide as the thorax; the tips of the mandibles and the apical joints of the flagellum dark ferruginous; the head smooth and shining; the eyes small, placed about the middle at the sides of the head. Thorax: the anterior margin rounded, the metathorax greatly dilated, with a deep excavation behind; the legs stout, with their articulations and the tarsi ferruginous. Abdomen heart-shaped, with the base, in some examples, slightly ferruginous. Worker minor only differs in being one-third smaller. Hab. Borneo (Sarawak); Singapore,