In my article ‘Two Textual Problems in Euripides’ Antiope, Fr. 188' (C.Q. N.S. xvii [1967], 41 ff.), in which I compared the debate of Amphion the unpractical musician and his industrious brother Zethus to the fable of the cicada and the ant, I drew attention to a passage of Olympiodorus' commentary on the Gorgias (p. 161, Norvin) which had been overlooked in the testimonia to Euripides' play, and which begins