Redescription of Schizomus crassicaudatus (Pickard-Cambridge) and Diagnoses of Hubbardia cook, Stenochrus chamberlin, and Sotanostenochrus new genus, with Description of a New Species of Hubbardia from California (Arachnida: Schizomida: Hubbardiidae)

Schizomus crassicaudatus from Sri Lanka is redescribed from the type series, and lectotypes of Nyctalops crassicaudata and N. Tenuicaudata are designed. Hubbardia Cook, previously considered a synonym of Schizomus Cook, is considered valid and rediagnosed to include species from California and Arizona. The family Hubbardiidae Cook has priority and therefore is used rather than Schizomidae Hansen and Sorensen. Additional descriptive notes and records are provided and a lectotypes is designated for Hubbardia pentapeltis Cook. Hubbardia idria new species is described from San Benito County, California. Additional records are included for H. briggsi. A key for identification of males of Hubbardia is presented. The native (introduced elsewhere) North and Central American genus Stenochrus Chamberlin is rediagnosed for most species of the Schizomus mexicanus, pecki, and goodnightorum groups. Sotanostenochrus, new genus, is described for Schizomus mitchelli Rowland, and Schizomus cookei Rowland and is known only from caves in San Luis Potosi and Tamaulipas, Mexico.