In a former paper, I have briefly referred to the Peculiarity of nest structure made by the larvæof our large Lepidopterous Nocturnal insects, in order to show that an attempt should be made to separate species on the similarity of form and texture of these structures. No doubt, when Entomology becomes thoroughly studied throughout the Dominion, much of the confusion in our prsent generic classification will be removed by means of investigations into the early history of larvæ and imagines of the many genera.