Scott, James A., authorJames A. Scott, publisher2016-02-192016-02-192016http://hdl.handle.net/10217/170674Includes bibliographical references.Ernest John Oslar collected more than 50,000 butterflies and moths and other insects and sold them to many taxonomists and museums throughout the world. This paper attempts to determine his travels in America to collect those specimens, by using data from labeled specimens (most in his remaining collection but some from published papers) plus information from correspondence etc. and a few small field diaries preserved by his descendants. The butterfly specimens and their localities/dates in his collection in the C. P. Gillette Museum (Colorado State University, Fort Collins, Colorado) are detailed. This information will help determine the possible collection locations of Oslar specimens that lack accurate collection data. Many more biographical details of Oslar are revealed, and the 26 insects named for Oslar are detailed.born digitaljournals (periodicals)engCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Papilio. New SeriesButterfliesLepidopteraText