The phlogosaria Complex of the Genus Plagodis (Lepidoptera: Geometridae)

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Abstract
Rupert's excellent revision (1949) has greatly clarified the classification of the North American species of P1agodis. One of the most interesting features of Rupert's work was his demonstration by rearing that what had previously been considered a distinct species, P1agodis keutzingaria Packard, was in fact the spring generation of the aestival P. phlogosmia Guenée. By analogy it followed that P. schuylkillensis Grossbeck must be considered the summer generation of P. purpuraria Pearsall and P. arrogaria Hulst that of P. fervidaria Herrich-Schaeffer. Rupert was thus able to group in three species elements that had previously been distributed among six.

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