Rebel (1940) listed 34 species of Noctuidae for Madeira. Since then finds of 7 further species (2 endemic) have been published. New material, partly placed at my disposal in order to contribute to a revision of the list of Madeiran Lepidoptera, partly collected by myself, contains 8 additional species of Noctuidae, one of which was hitherto unknown. In the present paper this species is described as Mythimna serradaguae and placed in the Mythimna sicula (Treitschke) group. Photographs of the male genitalia of allied species: M. saucesa Pinker, M. sicula (Treitschke), M. congrua (Hübner), and M. loreyi (Duponchel) are presented. The 15 species of Noctuidae new to the fauna of Madeira since 1940 are enumerated. Comments on these will appear in a revised list together with corrections to some of the taxa mentioned in the previous list (1940).