See von Ihering, Berlin. ent. Zeitschr. xxxix. 1894, p. 364; and Forel, Ann. Soc. ent. Belgique, xl. 1896, p. 170.
Ann. Soc. ent. Belgique, xxxvii. 1893, p. 163.
Bih. Svenska Ak. xxi. 1896, Afd. iv. No. 4.
Until recently this genus was generally known as Atta, but this name is now applied to the leaf-cutting ants, that were formerly called Oecodoma.
Forel, Bull. Soc. Vaudoise, xxx. pp. 29-30, 1894.