Commensal.—Myrmecoblatta rehni, Mexico (Mann, 1914): "They were very abundant, several occurring in almost every nest."
Subfamily MYRMICINAE
Acromyrmex lobicornis Emery
Commensal.—Attaphila bergi, or possibly a variety of this species, Huasán, Argentina? (Bruch, 1916).
Acromyrmex lundi (Guérin)
Synonymy.—Atta lundi [Brown, personal communication, 1957].
Commensal.—Attaphila bergi, Argentina and Uruguay (Bolívar, 1901): The cockroach was found in the nests of the ants sitting on the back, neck, or head of sexual individuals. It remains attached to the ant during swarming. The antennae seem always to be mutilated. Bruch (1916) stated that in La Plata A. bergi is encountered by hundreds in every nest of A. lundi.
Acromyrmex niger (F. Smith)
Synonymy.—Atta nigra Schupp [Brown, p.c., 1957].
Commensal.—Attaphila schuppi, Brazil, Porto Alegre (Bolívar, 1905): Found outside the nest of the ant and mixed in the columns of ants on the march.