Description of twenty four new subspecies of American Otus (Aves, Strigidae)

This paper gives a summary of the results of a comprehensive revision of the American species of the genus Otus Pennant, 1769, contained in a thesis presented at the Free University, Amsterdam. A checklist of American Otus is given, comparing the revised classification with that of Peters (1940). Twenty four new subspecies proposed in the thesis are validated herewith.