Leviores et (ut videtur) extemporaneae picturae
From The Art and Popular Culture Encyclopedia
Leviores et (ut videtur) extemporaneae picturae, quas grottescas vulgo vocant, quibus Romani Uli antiqui ad triclinia aliaque secretiora aedium looa exornanda utebantur  (Light and (as it can be seen) Extemporaneous Pictures which in Everyday Language Are Called Grotesques) is a collection of grotesque prints.
Title page for a set of grotesque prints, Leviores picturae, undated and unsigned though now thought to have been published in Rome by Antonio Lafrery (1512-77) sometime after 1544. The title page refers to a series of nineteen engravings of grotesques often ascribed to Enea Vico but now thought to be reverse copies of Vico’s originals, 1541-42. London: Victoria and Albert Museum.