A legendary Athenian who welcomed Dionysus to Attica and in return received the gift of the vine from the god. Icarius gave wine to the shepherds, but when they became intoxicated they thought Icarius had poisoned them, and so they slew him. His daughter Erigone, led by her dog Marea, found his body and hanged herself in grief. Dionysus punished the land by a plague, and inflicted all the maidens with madness so that they hanged themselves as did Erigone. The gods placed Icarius among the stars as Boötes.