William B. Muchmore (1920-2017) was the most influential worker on cave pseudoscorpions in North America and a globally-recognized expert on this arachnid order. Aside from brief stints in herpetological embryology and isopod taxonomy, he dedicated his 62-year career to the study of pseudoscorpions, focusing on their taxonomy. He described 278 new species, of which 167 were from caves. The majority of North American cave pseudoscorpions were either initially described or revised by him. He also wrote on the phoretic habits of pseudoscorpions, and speculated that cave pseudoscorpion distributions may be influenced by troglophilic rodents and bats. A complete bibliography of his scientific papers is provided.