Since 1963, when I published in Renaissance News (XVI,4, 298-307) a supplement to my Catalogue of Italian Plays, 1500-1700 in the University of Toronto Library (University of Toronto Press, 1961), the collection has been enriched by some fifty plays. Particularly interesting are the first Italian translation of Aristophanes; a group of the musical plays whose vogue grew steadily during the seventeenth century; and a couple of examples, Italian and Latin, of the other new musico-dramatic form of the period, the oratorio. Noteworthy also is Benetti's Scherno di Giove, a curious blending of mythology and commedia dell'arte which survived in the ‘classical’ burlesques of the Victorian theatre.