Natural hosts.—Parcoblatta pensylvanica and Parcoblatta uhleriana, U.S.A., Ohio (Semans, 1939): Midgut.
Gregarina rhyparobiae J. M. Watson
Natural host.—Leucophaea maderae, Uganda (Watson, 1945): Midgut. Trophozoites could be seen in sections attached to cells of the intestinal wall (fig. 2, H).
Gregarina sandoni Harrison
Natural host.—Melanosilpha capensis, South Africa (Harrison, 1955): This gregarine was found in the anterior and middle parts of the mesenteron and in the hepatic caeca.
Gregarina thomasi Semans
Natural host.—Parcoblatta pensylvanica, U.S.A., Ohio (Semans, 1939): Enteric caeca and midgut.
Protomagalhaesia serpentula (de Magalhães)
Synonymy.—Gregarina serpentula [Pinto, 1918a, 1919; Semans, 1943].