Hyginus Fabulae, 25-27 Medea, Medea in Exile, and Medus

25. Medea
     Medea, the daughter of Aeetes and Idyia, had born two sons conceived by Jason, Mermerus and Pheretes, and they all were living in the happiest condition. But people began to take issue with the fact that a man so heroic, handsome, and noble as he should have a wife who was a foreigner and a poisoner.
     Creon, the son of Menoecus and king of Corinth, offered him his young daughter Glauce to wife. When Medea saw that she wrought so much for Jason's sake but was treated with so much disdain, she infected a golden crown with her poisons and told her own sons to give it as a gift to their step-mother. Creusa accepted the gift and was consumed by fire along with Jason and Creon. When Medea saw the palace afire, she murdered Mermerus and Pheretes, her own children conceived by Jason, and fled from Corinth.

26. Medea in Exile
     Exiled from Corinth, Medea sought assylum with Aegeus, son of Pandion, and married him. From that union was born Medus. After the priestess of Diana began to rankle Medea, she denied the king religious sanction to offer sacrifice on the grounds that there was in the city a woman who was a sorceress and a criminal. Then she was exiled a second time.
Medea, however, yoked two dragons together and returned from Athens to Colchis. Then she came to Absorides on the journey, where her brother Apsyrtus had been buried. Thereupon the Absoritani were unable to defend themselves against an infestation of serpents. However, when they asked Medea to help, she picked up the snakes and threw them upon her brother's tomb. And the serpents are there to this day; yet, any serpent that leaves the tomb's precinct perishes.

27. Medus
     An oracle instructed Perses, son of the Sun and brother of Aeetes, that he should be wary of death coming from Aeetes' offspring: after many years passed, Medus, while seeking after his mother, was brought before Perses; for Perses' henchmen arrested him and brought him to the king.
     As Medus, the son of Aegeus and Medea, saw that he had come into his enemy's hands, he feigned that he was Creon's son Hippotes. The king carefully examined him and ordered him to be cast into prison; at that time there was said to be a famine and shortage of crops. When Medea arrived there in her chariot drawn by yoked dragons, she lied to the king that she was the priestess of Diana, and she said that she could expiate the famine. And when she heard from the king that Hippotes, Creon's son, was being held captive, she determined that he had come to prosecute an offense made against his father. Thereupon she unwittingly betrayed her son. For she convinced the king that the captive was not Hippotes but rather Medus, the son of Aegeus, who had been sent by his mother to murder the king, and she begged him to hand over to her the captive over for her to murder. For she thought that he was Hippotes.
     Thus, when Medus was brought forth to be executed for the lie and she saw that everything was different than she believed, she said that she wanted to confer with him and she gave him a knife, and she ordered him to avenge the offenses inflicted upon his grandparent. Medus obeyed the command, murdered Perses, and took again his grandfather's throne; from this deed he named the land Media after his own name.
     — translation RTMacfarlane
     

25. medea.
Aeetae Medea et Idyiae filia cum ex Iasone iam filios Mermerum et Pheretem procreasset summaque concordia uiuerent, obiciebatur ei hominem tam fortem ac formosum ac nobilem uxorem aduenam atque ueneficam habere.
     huic Creon Menoeci filius rex Corinthius filiam suam minorem Glaucen dedit uxorem. Medea cum uidit se erga Iasonem bene merentem tanta contumelia esse affectam, coronam ex uenenis fecit auream eamque muneri filios suos iussit nouercae dare.
     Creusa munere accepto cum Iasone et Creonte confraglauit. Medea ubi regiam ardere uidit, natos suos ex Iasone Mermerum et Pheretem interfecit et profugit a Corintho.

26. medea exvl. Medea Corintho exul Athenas ad Aegeum Pandionis filium deuenit in hospitium eique nupsit; ex eo natus est Medus.
     postea sacerdos Dianae Medeam exagitare coepit, regique negabat sacra caste facere posse eo quod in ea ciuitate esset mulier uenefica et scelerata. tunc iterum exulatur.
     Medea autem iunctis draconibus ab Athenis Colchos redit; quae in itinere Absoridem uenit, ubi frater Abysrtus sepultus erat. ibi Absoritani serpentium multitudini resistere non poterant; Medea autem ab eis rogata lectas eas in tumulum fratris coniecit, quae adhuc ibi permanentes, si qua autem extra tumulum exit, debitum naturae persoluit.

27. medvs. Persi Solis filio, fratri Aeetae, responsum fuit ab Aeetae progenie mortem cauere: ad quem Medus dum matrem persequitur tempestate est delatus, quem satellites comprehensum ad regem Persen perduxerunt.
     Medus Aegei et Medeae filius ut uidit se in inimici potestatem uenisse, Hippoten Creontis filium se esse mentitus est. rex diligentius quaerit et in custodia eum conici iussit; ubi sterilitas et penuria frugum dicitur fuisse.
     quo Medea in curru iunctis draconibus cum uenisset, regi se sacerdotem Dianae ementita est; dixit sterilitatem se expiare posse, et cum a rege audisset Hippoten Creontis filium in custodia haberi, arbitrans eum patris iniuriam exsequi uenisse, ibique imprudens filium prodidit.
      nam regi persuadet eum Hippoten non esse sed Medum Aegei filium a matre missum ut regem interficeret, petitque ab eo utinterficiendus sibi traderetur, aestimans Hippoten esse.
      itaque Medus cum productus esset ut mendacium morte puniret t illa aliter esse uidit quam putauit, dixit se cum eo colloqui uelle atque ensem ei tradidit iussitque aui sui iniurias exsequi. Medus re audita Persen interfecit regnumque auitum possedit; ex suo nomine terram Mediam cognominauit.