Dos Passos, Cyril F., 1887-Warren, Brisbane C. S.2005-10-062005-10-061947http://hdl.handle.net/2246/23184 p. ; 24 cm.Includes bibliographical references.591705 bytesapplication/pdfen-USQL1 .A436 no.1348, 1947Erebia youngi youngi.Erebia youngi herscheli.Erebia youngi rileyi.Butterflies -- Alaska -- Classification.Butterflies -- Northwest Territories -- Mackenzie -- Classification.Butterflies -- Yukon Territory -- Classification.Insects -- Alaska -- Classification.Insects -- Northwest Territories -- Mackenzie -- Classification.Insects -- Yukon Territory -- Classification.text