LYCOMEDES, (fab. hist.), a king of Scyros an island in the Ægean sea. He was son of Apollo and Parthenope. He was secretly entrusted with the care of young Achilles, whom his mother Thetis had disguised in woman's cloaths, to remove him from the Trojan war, where she knew he must unavoidably perish. Lycomedes has rendered himself famous for his treachery to Theseus, who had implored his protection when driven from his throne of Athens by the usurper Mnesitheus. Lycomedes, as it is reported, either envious of the fame of his illustrious guests, or bribed by the emissaries of Mnesitheus, led Theseus to an elevated place, on pretence to show him the extent of his dominions, and perfidiously threw him down a precipice, where he was killed.