* Entamoeba histolytica Schaudinn
Natural vectors.—Blatta orientalis, Blattella germanica, Periplaneta americana, Periplaneta australasiae, and/or Supella supellectilium, Peru (Schneider and Shields, 1947).
Blattella germanica and/or Periplaneta americana, Egypt (DeCoursey and Otto, 1956, 1957).
Cockroaches, Venezuela (Tejera, 1926).
Experimental vectors.—Blatta orientalis, Italian Somaliland (Mariani and Besta, 1936).
Periplaneta americana, Gold Coast Colony (Macfie, 1922); U.S.A. (Frye and Meleney, 1936).
Cockroaches, Venezuela (Tejera, 1926).