Viereck, Henry Lorenz, 1881-2005-10-062005-10-061917http://hdl.handle.net/2246/1922p. 241-242 ; 24 cm.Includes bibliographical references (p. 241).214598 bytesapplication/pdfen-USQH1 .A4 vol.37, art.8, 1917PerditaBees -- Middle Atlantic StatesInsects -- Middle Atlantic StatesContributions to our knowledge of the bee genus Perdita Smith. Bulletin of the AMNH ; v. 37, article 8.text