To other plays, such as the _Epidicus_ and _Bacchides_, there were originally no prologues, but they were prefixed after the death of the author, in order to explain the reasons for bringing them forward anew. It thus appears that in his prologues Plautus approached nearer to Euripides than to those comic writers whom in his argument and all other respects he chiefly followed. The prologues of Terence, again, seldom announce the subject. In the manner of the Greeks, his induction is laid in the first scene of the play, and the prologues seem chiefly intended to acknowledge the Greek original of his drama, and to explain matters personal to himself. They rather resemble the choruses of Aristophanes, which in the _Wasps_ and other plays directly address the audience in favour of the poet, and complain of the unjust reception which his dramas occasionally experienced. In the prologue to the _Amphitryon_, Plautus calls his play a tragi-comedy(230); probably not so much that there is any thing tragical in the subject, (although the character of Alcmena is a serious one,) as, because it is of that mixed kind in which the highest as well as lowest characters are introduced. The plot is chiefly founded on the well-known mythological incident of Jupiter assuming the figure of Amphitryon, general of the Thebans, during his absence with the army, and by that means imposing on his wife Alcmena. The play opens while Jupiter is supposed to be with the object of his passion. Sosia, the servant of Amphitryon, who had been sent on before by his master, from the port to announce his victory and approach, is introduced on the stage, proceeding towards the palace of Amphitryon. While expressing his astonishment at the length of the night, he is met, in front of his master’s house, by Mercury, who had assumed his form, and who, partly by blows and threats, and partly by leading him to doubt of his own identity, succeeds in driving him back. This gives Jupiter time to prosecute his amour, and he departs at dawn. The improbable story related by Sosia is not believed by his master, who himself now advances towards his house, from which Alcmena comes forth, lamenting the departure of her supposed husband; but seeing Amphitryon, she expresses her surprise at his speedy return. The jealousy of Amphitryon is thus excited, and he quits the stage, in order to bring evidence that he had never till that time quitted his army. Jupiter then returns, and Amphitryon is afterwards refused access to his own house by Mercury, who pretends that he does not know him. At length Jupiter and Amphitryon are confronted. They are successively questioned as to the events of the late war by the pilot of the ship in which Amphitryon had returned. As Jupiter also stands this test of identity, the real Amphitryon is wrought up to such a pitch of rage and despair, that he resolves to wreak vengeance on his whole family, and is provoked even to utter blasphemies, by setting the gods at defiance.