instabilis. Tapinoma instabilis Smith, F. 1862b: 31 (w.) PANAMA. Emery, 1893b: 135 (s.); Emery, 1896b: 2 (q.); Wheeler, G.C. & Wheeler, J. 1951: 193 (l.). Combination in Liometopum: Mayr, 1878: 870; in Azteca: Emery, 1893b: 135. See also: Wheeler, W.M. 1907a: 276. Senior synonym of major: Longino, 2007: 35.