Class NEMATODA
Order MERMITHOIDEA
Family MERMITHIDAE
Undetermined mermithids
Natural Hosts.—Ectobius pallidus, U.S.A., Plymouth, Massachusetts (Roth and Willis, 1957): This mermithid lies coiled in the body cavity of the host and one end may extend into the thorax. Apparently, the host is eventually killed and the worms may leave the cockroach ventrally between the thorax and abdomen (pl. [29], A) or thorax and head.
Periplaneta americana, Germany (Bode, 1936): Attacked by "Mermis" or "Gordius." It has been suggested that the name Mermis is often applied without critical identification to immature Nematoda found in insects (Buxton, 1955).
Order RHABDITOIDEA
Family DIPLOGASTERIDAE
Diplogaster sp.
Synonymy.—Lycolaimus [Goodey, 1951].