Before, "army ant" meant ants from 5 different ant subfamilies: in two of these subfamilies, the Ponerinae and Myrmicinae, it is only a few species that show legionary behavior; in the other three subfamilies, Ecitoninae, Dorylinae, and Leptanillinae, "all" of the species are legionary. Now, another subfamily Leptanilloidinae, is called army ants.