Abstract
In the preparation of the present paper I have used articles by myself which have appeared in the “Popular Science Monthly,” in the pages of “Silliman's Journal,” and elsewhere. I have also noticed what has been printed bearing on the subject by other writers. I have tried to present the whole subject as it now appears to me, at the risk of repeating myself in part. Ihis seemed at times excusable if not unavoidable, but as it is my own writings that I have chiefly borrowed from, the use of quotation marks is unnecessary, the more so as I have here gone freshly over the subject, digesting my previous observations and adding new ones before preparing the present chapter in a history of our North American Lepidoptera. Some of my views, as here stated, were put forth in a lecture I held in 1885, before the Bremen “Naturwissenschaftlichen Verein.” I shall be glad if this paper adds to the interest naturally evoked by this field of study in Natural History.
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