Acromyrmex silvestrii Emery
Commensal.—Attaphila bergi, or possibly a variety of this species, San Luis Province, Argentina (Bruch, 1916): According to Bruch, the behavior of this species of Attaphila is identical with the one encountered in Huasán in the nests of Acromyrmex lobicornis Emery; it differed from A. bergi in size and color.