Natural host.—Periplaneta americana, Brazil (Magalhães, 1900): In the coelom and alimentary canal. The host of this parasite (fig. 2, K) was incorrectly cited as Blatta orientalis by Watson (1916).
Gamocystis tenax Schneider
(Fig. 2, L)
Natural hosts.—Ectobius lapponicus, France (Schneider, 1875); Germany (Wellmer, 1910, 1911; Foerster, 1938).
Ectobius pallidus, Germany (Foerster, 1938): In intestine.
Family ACTINOCEPHALIDAE
Pileocephalus blaberae (Frenzel)
Synonymy.—Gregarina blaberae [Watson, 1916].
Natural hosts.—Blaptica dubia and related forms, Argentina (Frenzel, 1892): In midgut.