My last paper in the Proceedings of the Am. Philosophical Society, Philadelphia, contains a number of typographical errors, the most serious of which I corrected subsequently by an “errata” in a later volume, not being able to see the proofs. This paper reviewed the main and first two groups, leaving the Fasciatæ (Catocalinæ Pack.) and the Deltoids unrevised. I would recognise five very unequal groups both in structural value an extent. Adopting Packard's nomenclature so far as he went (this author excluded the Deltoids at the time), we may call these groups subfamilies, but in Europe my Thyatiridœ and the Brephidœ are taken out of the Noctuidœ as distinct families.