The chief part of the _Eunuchus_ is taken from a play of the same title by Menander; but the characters of the parasite and captain have been transferred into it from another play of Menander, called _Kolax_. There was an old play, too, by Nævius, founded on the _Kolax_; but Terence, in his prologue, denies having been indebted to this performance. The scenes of the _Eunuchus_ are so arranged, that the main plot is introduced by that which is secondary, and which at first has the appearance of being the principal one. Phædria is brought on the stage venting his indignation at being excluded from the house of the courtezan Thais, for the sake of Thraso, who is the sole braggart captain exhibited in the plays of our author. Thais, however, succeeds in persuading Phædria that she would admit Thraso only for two days, in order to obtain from him the gift of a damsel who had originally belonged to the mother of Thais, but after her death had been sold to the captain. Phædria, vying in gifts with Thraso, presents his mistress with an Ethiopian eunuch. The younger brother of Phædria, who is called Chærea, having accidentally seen the maid presented to Thais by Thraso, falls in love with her, and, by a stratagem of his father’s slave Parmeno, he is introduced as the eunuch to the house of Thais, where he does not in all respects consistently support the character he had assumed. After Chærea had gone off, his adventure was discovered; and Pythias, the waiting maid of Thais, in revenge for Parmeno’s fraud, tells him that Chærea, having been detected, was about to be made precisely what he had pretended to be. Parmeno, believing this report, informs the father of Chærea, who instantly rushes into the house of Thais, (to which, by this time, his son had ventured to return,) and being there relieved from his sudden apprehension, he consents the more readily to the marriage of Chærea with the girl whom he had deluded, and who is now discovered to be an Athenian citizen, and the sister of Chremes. In this paroxysm of good humour, he also agrees that Phædria should retain Thais as his mistress. Thraso and his parasite, Gnatho, having been foiled in an attack on the house of Thais, enter into terms, and, at the persuasion of Gnatho, Thraso is admitted into the society of Phædria, and is allowed to share with him the favours of Thais.