* The libretto - either though a pastedown or an addition of some sort - indicates that the aria is to be sung in place of one with the same Act and Scene number.
** The libretto is lacking the Italian text for this particular aria.
*** This text has been deleted, but there is no replacement.
**** This text is an extra text, but is not replacing an original text.
§ The libretto includes these extra texts, but with no indication of where they are to be placed in the opera.