Despite their relatively large size and abundance in diverse Nearctic ecosystems, the Paederinae (Staphylinidae) of North America have received only limited taxonomic attention since the early 1900s. In preparation for a revised key to the paederine genera of Canada and the United States, several taxonomic issues highlighted twenty years ago in the last such work (American Beetles) were investigated. Additionally, previous taxonomic confusion of Pseudolathra Casey and Lobrathium Mulsant and Rey in the Nearctic region, now both valid genera and considered rather distantly related, has created doubt surrounding the validity of subgeneric names and placement of many species. A comprehensive checklist was therefore given for the Nearctic species of Pseudolathra, and the following are treated as its junior synonyms: Lathrobiella Casey, new synonym, Lathrotaxis Casey, new synonym, Linolathra Casey, Microlathra Casey, and Paralathra Casey. Paederopsis gloydi Kistner, new synonym is treated as a junior synonym of Dacnochilus compactus (Casey). Paederopsis Wasmann, a probable synonym of Dacnochilus LeConte, is removed from the Nearctic fauna. Acrostilicus Hubbard and its single species, Acrostilicus hospes Hubbard, are redescribed based on the first available specimens in 125 years. Acrostilicus is confirmed as a valid genus in Stilicina. Lissobiops Casey, new synonym is treated as a junior synonym of Hesperobium Casey, currently a subgenus of Homaeotarsus Hochhuth. New state and province records are given for Homaeotarsus serpentinus (LeConte), new combination, Homaeotarsus cribratus (LeConte), and Homaeotarsus sellatus (LeConte).