In the Reports of Dr. Harris and Prof. Riley and some other State Entomologists, the structural characters of the genus Agrotis are not given, and the term is evidently loosely applied to cover certain Noctuidæ known as “cut-worms.” In Dr. Harris's Report, as I have shown, the moth Hadena devastatrix (the Agrotis devastator of Brace) is considered to be an Agrotis, while Agrotis Clandestina, which has the structural characters of Agrotis, is referred to the old Linnean gents Noctua, now without standing in our lists. The three genera to which the “cut-worms” are referable, Agrotis, Hadena and Mamestra, are separated in the Preface to my list of the Noctuidæ, p. 3. April, 1874, by their characters.