It is only comparatively recently that I have seen the article of Mr. B. Neumoegen upon the genus Arctia and its variations, contained in Papilio, vol. 3, p. 148. So far as my own experience and conclusions go, I am, except in two instances which I notice here, generally agreed with the views of this writer. Especially am I of opinion that recently there has been an unscientific and unsound attempt to class as one species forms of Lepidoptera quite different in appearance, upon insufficient evidence. I have formerly pointed out that Entomologists are naturally divided into two camps: the “lumpers” and the “splitters.” For my part I do not at all object to present species being thrown together as varieties, provided the evidence is complete that they are inter-dependent forms. What I object to is the hasty manner in which the most of the lumping is accomplished in some recent articles, such as Dr. Hagen's on Papilio and Mr. Hulst's on Arctia.