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 19. Atta vigilans . B.M. Worker. Length 2 lines.-Ferruginous, with the abdomen fuscous, and its base more or less pale. Head very largely developed, oblong, with a deep emargination behind, and a central longitudinal channel extending to the clypeus; the posterior half of the head, the clypeus and mandibles, smooth and shining, the latter with a few scattered punctures; the anterior margin of the face and the inner margin of the mandibles blackish; the anterior half of the face striated. Thorax smooth and shining; a deep strangulation between the meso- and metathorax, the latter with two short acute spines. Abdomen ovate and slightly pubescent. Hab. Australia (Melbourne).