Snyder, Frederic Marhoff.2005-10-062005-10-061949http://hdl.handle.net/2246/1002p. 111-160 ; 27 cm.Includes bibliographical references (p. 106).10749790 bytesapplication/pdfen-USQH1 .A4 vol.94, art.3, 1949HelinaMuscidae -- North AmericaInsects -- North AmericaNearctic Helina Robineau-Desvoidy (Diptera, Muscidae). Bulletin of the AMNH ; v. 94, article 3text