Leucophaea maderae, Brazil (Pessôa and Corrêa, 1927).
Periplaneta americana, South Africa (Porter, 1918); Gold Coast Colony (Macfie, 1922); Brazil (Pessôa and Corrêa, 1927); U.S.A. (Young, 1937).
Periplaneta brunnea, U.S.A. (Young, 1937).
Cockroaches, Venezuela (Tejera, 1926); Argentina (Bacigalupo, in Tejera, 1926).
* Giardia sp.
Natural vectors.—Cockroaches, Venezuela (Tejera, 1926).
Order HYPERMASTIGINA
Family HOLOMASTIGOTIDAE