Blaniulus venustus Meinert, 1868 accepted as Nopoiulus kochii (Gervais, 1847) (additional source)
Cambala washingtonensis Causey, 1954 (original description)
Diploiulus truncorum Silvestri, 1896 accepted as Cylindroiulus truncorum (Silvestri, 1896) (additional source)
Fontaria gracilis C. L. Koch, 1847 accepted as Oxidus gracilis (C. L. Koch, 1847) (additional source)
Ischnocybe plicata Cook & Loomis, 1928 (additional source)
Julus frisius Verhoeff, 1891 accepted as Cylindroiulus latestriatus (Curtis, 1845) (additional source)
Leptodesmus elrodi Chamberlin, 1913 accepted as Montaphe elrodi (Chamberlin, 1913) (additional source)
Nearctodesmus cochlearius Causey, 1954 accepted as Nearctodesmus insulanus (Chamberlin, 1941) (original description)
Nearctodesmus olympus Causey, 1954 accepted as Nearctodesmus insulanus (Chamberlin, 1941) (original description)
Opiona hatchi Causey, 1954 accepted as Opiona columbiana Chamberlin, 1951 (original description)
Paraiulus tiganus Chamberlin, 1910 accepted as Bollmaniulus tiganus (Chamberlin, 1910) (additional source)
Polydesmus racovitzai Brölemann, 1910 accepted as Propolydesmus racovitzai (Brölemann, 1910) (additional source)
Saiulus setifer Chamberlin, 1940 (additional source)
Scytonotus pallidus Attems, 1931 accepted as Scytonotus bergrothi Chamberlin, 1911 (additional source)
Taijulus olympus Causey, 1953 accepted as Bollmaniulus olympus (Causey, 1953) (additional source)

Washington (State) for Cambala washingtonensis Causey, 1954 
Washington (State) for Nearctodesmus cochlearius Causey, 1954 
Washington (State) for Nearctodesmus olympus Causey, 1954 
Washington (State) for Opiona hatchi Causey, 1954