Stanford, Ray E., authorOpler, Paul A., author2016-01-152016-01-151993-01http://hdl.handle.net/10217/170445Includes bibliographical references (pages vii-ix) and index (pages 261-265).Chiefly maps.January 1993.reportsengCopyright 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.Butterflies -- West (U.S.) -- Geographical distribution -- MapsButterflies -- Canada, Western -- Geographical distribution -- MapsButterflies -- Mexico, North -- Geographical distribution -- MapsText