The Austrian-born composer Egon Wellesz (1885-1974) is a barely recognized figure in the history of western music. + For his rarely heard two-act Die Bakchantinnen, one of his half-dozen operas, Wellesz wrote his own libretto based on the ancient Greek play The Bacchae of Euripides. + This Vienna, 1960 performance, conducted by Mitiades Caridis features at least two well-known singers, the baritone Paul Schöffler and the tenor Fritz Uhl. + A most enticing item for the opera-collecting completist.