Droit du seigneur
In Mozart's "The Marriage of Figaro", which premiered in 1786 with a libretto by Lorenzo Da Ponte, the comic plot revolves around the successful efforts of the young bride and groom, Figaro and Susanna, to block the efforts of the unfaithful Count Almaviva to seduce Susanna. To achieve his aim, the frustrated Count threatens to reinstitute "droit du seigneur". It was based on a play by Pierre Beaumarchais.
Stichomythia
In the scene in Wolfgang Amadeus Mozart's opera "The Marriage of Figaro", libretto by Lorenzo Da Ponte, where Susanna learns that Marcellina is Figaro's mother, she repeats her disbelief ("Sua madre?", that is, "his mother?") to each character and is reassured in the same words. A critic has called that "the merriest and most congenial form imaginable" of stichomythia. For another example from opera, the following passage from the libretto by Andrea Maffei for Giuseppe Verdi's "I masnadieri" has been called "musical stichomythia", though it does not contain repetition or antithesis:
AMALIA: Qual mare, qual terra da me t'ha diviso?
CARLO: Deh! cessa, infelice, l'inchiesta crudel!
AMALIA: Mendaci novelle ti dissero ucciso.
CARLO: Beato se chiuso m'avesse l'avel!
AMALIA: Tu pure, o mio Carlo, provasti gli affanni?
CARLO: Li possa il tuo core per sempre ignorar!
AMALIA: Anch'io, derelitta, ti piansi lung'anni.
CARLO: E un angelo osava per me lagrimar?