Excerpt from Bulletin of the Buffalo Society of Natural Sciences, Vol. 1: From April, 1873, to March, 1874
It is Fabricius who, in 1793, arranges under the generic name Sesz'a, a number of moths which have for a common character the more or less pellucid wings. However, the moths thus early brought together belonged to two distinct structural groups - families in the Latreillean sense. In 1807, Fabricius restricts the term Seem to members of the family under present consideration - the Sphingidae, and proposes the term Aegeria, for the group afterwards known, it seems to me properly, as Aegeriidae by the English Entomologists. This restriction is overlooked on the continent of Europe, where the term Sesta has been generally, and I must believe incorrectly, used as equivaleiit to Aegeria, Fabr. But under the generic term Easter, in the Systema Glossatorum Fabricius arranges a number of species, which are properly the types of distinct genera, according to our present acceptation. Among these species is the European fucz'formz's, for which the term Seam has been retained by English writers, and is used in 1865 by ourselves for congeneric American forms. It is overlooked that Dalman has taken S. Fuci formis as the type of his genus Hemaris, and that this name, having priority over the subsequent restrictions of Fabricius' term, must be retained for this type.
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