Taxa included

Jackson, A.R. (1909). On some rare arachnids obtained during 1908. Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne, new series 3: 418–439.

Taxon
Chthonius tenuis L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 438, Chthonius tenuis
Dendrochernes cyrneus (L. Koch, 1873) (Pseudoscorpiones: Chernetidae) 438, Chernes cyrneus
Chthonius rayi L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 438, (as Chthonius rayii), Chthonius rayi