Fossil Butterflies / Memoirs of the American Association for the Advancement of Science, I.

The memoir assembles historical references and original examinations of fossil lepidopterans, providing systematic descriptions and illustrations of genera and species from multiple European collections. It reviews the bibliography of past reports, compares the geological ages and probable host plants of tertiary caterpillars, discusses present distributions of related living butterflies, and offers a general résumé with notes on undetermined or misidentified specimens. Plates and figures accompany species accounts, and the work corrects previous erroneous referrals of certain fossils to butterflies. The text aims to consolidate knowledge of extinct butterflies and to lay a precise foundation for further paleontological and comparative studies.