I use the name Gortyna in preference to Hydrœcia as, without pretending to be an authority upon the question, it appears to me that there is better authority for the former, as used by Mr. Grote, than for the latter. My acquaintance with the moths of this genus, which I have always admired, dates back about thirty years, but in spite of that length of time my knowledge of them up till last year was of the most meagre description, and apart from the species which has stood so long in our collections under the name Nictitans, and a few specimens of Velata, Walk., I only possessed about half a dozen specimens, mostly in poor condition, representing Immanis, Stramentosa, Rigida, Nebris, Rutila, and a form which Mr. Bird believes to be new.