Note 45 — PROMETHEUS CHAINED.
Theodore Alois Buckley translation
No clew is given as to the form in which Io was represented on the stage. In v. 848, the promise ἐνταῦθα δή σε Ζεὺς τίθησιν ἔμφρονα does not imply any bodily change, but that Io labored under a mental delusion. Still the mythologists are against us, who agree in making her transformation complete. Perhaps she was represented with horns, like the Egyptian figures of Isis, but in other respects as a virgin, which is somewhat confirmed by v. 592, κλύεις φθέγμα τᾶς βούκερω παρθένου.