The species and genera of the family Trogositidae in America north of Mexico are revised. Two subfamilies are recognized: Peltinae and Trogositinae. The Peltinae include: Calitys Thomson (2 species), Eronyxa Reitter (3 species), Ostoma Laicharting (3 species), Grynocharis Thomson (2 species), Lophocateres Olliff (1 species), and Thymalus Latreille (1 species). The Trogositinae include: Nemosoma Latreille (5 species), Cylidrella Sharp (1 species), Corticotomus Sharp (6 species), Euschaefferia Leng (2 species), Airora Reitter (3 species), Temnochila Westwood (10 species), and Tenebroides Piller and Mitterpacher (18 species). Pseudocotomus Schaeffer is placed in synonymy with Euschaefferia Leng and Parafilumis Casey with Corticotomus Sharp. New species are Temnochila omolopha from Arizona and New Mexico and Temnochila rhyssa from California and Idaho. Synonymies, keys, descriptions, collecting and locality data, and illustrations are included. A checklist places all the species and genera in the proposed classification. Interpretation of relationships of the genera and species is included. The North American taxa are associated with the trogositid taxa from other parts of the world, and with groups within the other families of Cleroidea. Relationships among the taxa are postulated. The inclusion of peltines and trogositines in a single family is upheld.