Atopetholus pearcei Chamberlin, 1950 (original description)
Bdellozonium rothi Chamberlin, 1950 accepted as Bdellozonium cerviculatum Cook & Loomis, 1928 (original description)
Eucybe longior Chamberlin, 1950 accepted as Gosodesmus claremontus Chamberlin, 1922 (original description)
Euzonium Chamberlin, 1950 accepted as Octoglena Wood, 1864 (original description)
Euzonium crucis Chamberlin, 1950 accepted as Octoglena bivirgata Wood, 1864 accepted as Octoglena bivirgatum Wood, 1864 (original description)
Pizonium Chamberlin, 1950 accepted as Buzonium Cook & Loomis, 1928 (original description)
Pizonium crescentis Chamberlin, 1950 accepted as Buzonium crassipes Cook & Loomis, 1928 (original description)
Rhinocricus approximans Hoffman, 1950 accepted as Anadenobolus approximans (Hoffman, 1950) (original description)
Rhinocricus simulatus Chamberlin, 1950 accepted as Anadenobolus simulatus (Chamberlin, 1950) (original description)
Spathiulus tuolumnus Chamberlin, 1950 (original description)
Stenocybe Chamberlin, 1950 accepted as Gosodesmus Chamberlin, 1922 (original description)
Stenocybe waipea Chamberlin, 1950 accepted as Gosodesmus claremontus Chamberlin, 1922 (original description)
Uroblaniulus idahoanus Chamberlin, 1950 (original description)

California for Atopetholus pearcei Chamberlin, 1950 
California for Eucybe longior Chamberlin, 1950 
California for Euzonium crucis Chamberlin, 1950 
California for Pizonium crescentis Chamberlin, 1950 
California for Spathiulus tuolumnus Chamberlin, 1950 
California for Stenocybe waipea Chamberlin, 1950 
Idaho for Uroblaniulus idahoanus Chamberlin, 1950 
Oregon for Bdellozonium rothi Chamberlin, 1950