DON CARLOS, (1) An opera seria in 3 acts, words by Tarantini, music by Costa; produced at Her Majesty's Theatre, London, June 20, 1844. (2) Grand opera in 5 acts, words by Demèry [App. p.617 "Mery"] and Du Locle, music by Verdi; produced at the Grand Opéra, Paris, March 11, 1867, and in London, at Her Majesty's Theatre, June 4 of the same year.