Taxa included

McIntire, S.J. (1868). On pseudo-scorpiones. Journal of the Quekett Microscopical Club 1: 8–14.

Taxon
Pseudoscorpiones de Geer, 1778 8, (as Pseudo-scorpiones), Pseudoscorpiones de Geer
Ephippiochthonius tetrachelatus (Preyssler, 1790) (Pseudoscorpiones: Chthoniidae) 8, (misidentification), Obisium orthodactylum Leach
Chthonius orthodactylus (Leach, 1817) (Pseudoscorpiones: Chthoniidae) 8, (misidentification; see Ephippiochthonius tetrachelatus), Obisium orthodactylum Leach
Chelifer Geoffroy, 1762 (Pseudoscorpiones: Cheliferidae) 8, Chelifer
Neobisium Chamberlin, 1930 (Pseudoscorpiones: Neobisiidae) 9, Obisium Illiger