
1) Italian-language opera 2) Opera by Arrigo Boito
Found on
https://www.crosswordclues.com/clue/mefistofele

Mefistofele is an opera in a prologue, four acts and an epilogue, the only completed opera by the Italian composer-librettist Arrigo Boito. The opera was given its premiere on 5 March 1868 at La Scala, Milan under the baton of the composer, despite his lack of experience and skill as a conductor. However, it was not a success and immediately withd...
Found on
http://en.wikipedia.org/wiki/Mefistofele

(from the article `Boito, Arrigo`) Italian poet and composer acclaimed for his opera Mefistofele (1868; for which he composed both libretto and music) and his librettos after William ... Arrigo Boito not only wrote the librettos of Verdi`s last two operas but was himself a composer, as well as a poet, polemicist, and man of letters. ......
Found on
http://www.britannica.com/eb/a-z/m/64
No exact match found.