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 26. Atta nigriventris . B.M. Worker minor. Length 1 line.-The head and thorax ferruginous; the abdomen and legs black, entirely smooth and shining; the antennae fuscous; the articulations of the legs and the tarsi pale ferruginous. The thorax with a deep strangulation between the meso- and metathorax, the latter with two minute upright spines. Hab. Brazil (Rio).