i Suda λ 340
Λεύκων· † Ἀγνώς, † γεγονὼς ἐν τοῖς Πελοποννησιακοῖς. τῶν δραμάτων αὐτοῦ ἐστι ταῦτα· Ὄνος ἀσκοφόρος, Φράτορες.
ἀγνώς codd., Ἅγνωνος Toup, Ἁγνούσιος Wolf.
ii IG ii2 2325.66
iii Hypothesis I Wasps
ἐδιδάχθη ἐπὶ ἄρχοντος Ἀμεινίου διὰ Φιλωνίδου . . .β΄ ἦν εἰς Λήναια. καὶ ἐνίκα πρῶτος Φιλωνίδης Προάγωνι. Λεύκων Πρέσβεσι.
One of the lesser figures of Old Comedy, Leucon competed against Aristophanes in 422 (with Envoys) and 421 (with Phratry-Members), finishing third on both occasions. Only Phratry-Members is ever cited; it may have been the only one available to the writers of antiquity. Leucon did win a victory at the Dionysia (T 2), but some years later, c. 410.Testimonia
i Leucon, son of Hagnon (?) [or “of Hagnous,” an Attic deme], lived during the Peloponnesian War. His plays include: Bag-Bearing Donkey, Phratry-Members.
ii [on the list of victors at the Dionysia, c. 410] Leu[con
iii [Wasps] was produced in the archonship of Ameinias [423/2] through Philonides . . . it was second at the Lenaea. Philonides won first prize with Preview, Leucon <was Third> with Envoys.