Taxa included

Hoff, C.C. & Bolsterli, J.E. (1956). Pseudoscorpions of the Mississippi River drainage basin area. Transactions of the American Microscopical Society 75: 155–179.

Taxon
Ephippiochthonius tetrachelatus (Preyssler, 1790) (Pseudoscorpiones: Chthoniidae) 157, Chthonius (Ephippiochthonius) tetrachelatus (Preyssler)
Chthonius paludis (Chamberlin, 1929) (Pseudoscorpiones: Chthoniidae) 157, Kewochthonius paludis (Chamberlin)
Apochthonius moestus (Banks, 1891) (Pseudoscorpiones: Chthoniidae) 158–159, (misidentification; true identification unknown), Apochthonius moestus (Banks)
Mundochthonius rossi Hoff, 1949 (Pseudoscorpiones: Chthoniidae) 158, Mundochthonius rossi
Mundochthonius sandersoni Hoff, 1949 (Pseudoscorpiones: Chthoniidae) 158, Mundochthonius sandersoni
Kleptochthonius (Kleptochthonius) multispinosus (Hoff, 1945) (Pseudoscorpiones: Chthoniidae) 159, Kleptochthonius multispinosus (Hoff)
Verrucaditha spinosa (Banks, 1893) (Pseudoscorpiones: Chthoniidae) 160, Verrucaditha spinosa (Banks)
Microbisium confusum Hoff, 1946 (Pseudoscorpiones: Neobisiidae) 160, Microbisium confusum
Microbisium brunneum (Hagen, 1868) (Pseudoscorpiones: Neobisiidae) 161, Microbisium brunneum (Hagen)
Novobisium tenue (Chamberlin, 1930) (Pseudoscorpiones: Neobisiidae) 161–162, Neobisium carolinensis tenue
Microbisium parvulum (Banks, 1895) (Pseudoscorpiones: Neobisiidae) 161, Microbisium parvulum (Banks)
Tuberocreagris rufula (Banks, 1891) (Pseudoscorpiones: Neobisiidae) 162, Microcreagris rufula (Banks)
Syarinus granulatus Chamberlin, 1930 (Pseudoscorpiones: Syarinidae) 163, Syarinus granulatus
Microcreagris atlantica Chamberlin, 1930 (Pseudoscorpiones: Neobisiidae) 163, Microcreagris atlantica
Larca granulata (Banks, 1891) (Pseudoscorpiones: Larcidae) 163–164, Larca granulata (Banks)
Apocheiridium stannardi Hoff, 1952 (Pseudoscorpiones: Cheiridiidae) 164, Apocheiridium stannardi
Idiogaryops paludis (Chamberlin, 1932) (Pseudoscorpiones: Sternophoridae) 164–165, Sternophorus paludis
Americhernes oblongus (Say, 1821) (Pseudoscorpiones: Chernetidae) 165–166, Lamprochernes oblongus (Say)
Lamprochernes minor Hoff, 1949 (Pseudoscorpiones: Chernetidae) 166, Lamprochernes minor
Chelifer (Chernes) godfreyi Kew, 1911 (Pseudoscorpiones: Cheliferidae) 166–167, Lamprochernes godfreyi (Kew)
Lustrochernes carolinensis Muchmore, 1991 (Pseudoscorpiones: Chernetidae) 167–168, (in part), Lustrochernes pennsylvanicus (Ellingsen)
Chelifer communis pennsylvanicus Ellingsen, 1910 (Pseudoscorpiones: Cheliferidae) 167–168, (in part; see Lustrochernes carolinensis Muchmore), Lustrochernes pennsylvanicus (Ellingsen)
Pselaphochernes scorpioides (Hermann, 1804) (Pseudoscorpiones: Chernetidae) 168–169, Pselaphochernes scorpioides (Hermann)
Pselaphochernes parvus Hoff, 1945 (Pseudoscorpiones: Chernetidae) 168, Pselaphochernes parvus
Illinichernes distinctus Hoff, 1949 (Pseudoscorpiones: Chernetidae) 169, Illinichernes distinctus
Parachernes squarrosus Hoff, 1949 (Pseudoscorpiones: Chernetidae) 169, Parachernes squarrosus
Hesperochernes occidentalis (Hoff and Bolsterli, 1956) (Pseudoscorpiones: Chernetidae) 170–174, figs 1–3, Pseudozaona occidentalis
Pseudozaona Beier, 1932 (Pseudoscorpiones: Chernetidae) 170, (synonymised by Muchmore, 1984d: 356), Pseudozaona
Dinocheirus venustus Hoff and Clawson, 1952 (Pseudoscorpiones: Chernetidae) 174–175, Dinocheirus venustus
Acuminochernes crassopalpus (Hoff, 1945) (Pseudoscorpiones: Chernetidae) 174, Acuminochernes crassopalpus (Hoff)
Dinocheirus solus Hoff, 1949 (Pseudoscorpiones: Chernetidae) 175, Dinocheirus solus
Mirochernes dentatus (Banks, 1895) (Pseudoscorpiones: Chernetidae) 176, Mirochernes dentatus (Banks)
Chernes ewingi (Hoff, 1949) (Pseudoscorpiones: Chernetidae) 176, Reginachernes ewingi
Reginachernes Hoff, 1949 (Pseudoscorpiones: Chernetidae) 176, (synonymised with Hesperochernes by Hoff, 1963a: 3; synonymised with Chernes by Muchmore, 1974d: 31), Reginachernes
Chernes lymphatus (Hoff, 1949) (Pseudoscorpiones: Chernetidae) 176–177, Reginachernes lymphatus
Idiochelifer nigripalpus (Ewing, 1911) (Pseudoscorpiones: Cheliferidae) 177, Idiochelifer nigripalpus (Ewing)
Chelifer cancroides (Linnaeus, 1758) (Pseudoscorpiones: Cheliferidae) 177, Chelifer cancroides (Linnaeus)
Parachelifer longipalpus Hoff, 1945 (Pseudoscorpiones: Cheliferidae) 177–178, Parachelifer longipalpus
Dactylochelifer copiosus Hoff, 1945 (Pseudoscorpiones: Cheliferidae) 178, Dactylochelifer copiosus