* Trichomonas hominis (Davaine)
Experimental vectors.—Blatta orientalis, South Africa (Porter, 1918); Italy (Mariani and Besta, 1936).
Periplaneta americana, South Africa (Porter, 1918); U.S.A. (Hegner, 1928).
Trichomonas sp.
Natural vector.—Cockroach, Venezuela (Tejera, 1926): Organism found in digestive tract of the cockroach.
Family HEXAMITIDAE
Hexamita cryptocerci Cleveland et al.
Natural hosts.—Cryptocercus punctulatus, U.S.A. (Cleveland et al., 1934).
Panesthia angustipennis, Philippine Islands (Kidder, 1937).