Natural host.—Melanosilpha capensis, South Africa (Harrison, 1955): All specimens of this gregarine were found in the anterior mesenteron of the host.
Gregarina légeri Pinto
Natural host.—Periplaneta americana, Brazil (Pinto, 1918, 1918a, 1919): Intestinal canal.
Gregarina neo-brasiliensis Al. Cunha
Natural host.—Periplaneta americana, Brazil (R. de Almeida Cunha in Pinto, 1919; Cunha, 1919).
Gregarina ohioensis Semans
Natural host.—Parcoblatta virginica, U.S.A., Ohio (Semans, 1939): The protozoan was present in large numbers in the insect's midgut.
Gregarina panchlorae Frenzel
Natural host.—Panchlora exoleta, Argentina (Frenzel, 1892): Midgut.