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 114. Formica custodiens . B.M. Worker. Length 2 lines.-Head, thorax and legs ferruginous, and covered with a silky cinereous pile. Head emarginate behind. The thorax deeply strangulated at the base of the metathorax; the scale of the peduncle narrow, incrassate, obtuse above. Abdomen ovate, black, and covered with grey silky pile. Hab . Port Natal. This species is attached by its mandibles to the leg of a species of Pansus.