The sub-family Noctuinœ embraces the typical Noctuidœ and we may taken the genera Agrotis or Hadena as normal forms, from which we have a mass of more or less divergent structural groups. The characters which are made the basis of generic sub-division, according to a natural system which I find most plainly indicated in the writings of Stephens and Lederer, need not delay us here, for the reason that I have exposes them in previous writings.