i Diogenes Laertius 5.83, 85
γεγόνασι δὲ Δημήτριοι ἀξιόλογοι εἴκοσι . . . ποιηταὶ δὲ πρῶτος ἀρχαίαν κωμῳδίαν πεποιηκώς.
ii P. Oxy. 2659 F 1 col. ii 7
Δημητρ[ίου Διονύσου [ Σικελία
Since F 1 must belong after 404, we have in Demetrius a poet from the last period of Old Comedy. His comedy Sicily seems to have had a strong political theme, while Dionysus’ [………] belongs to the subgenre of the burlesque of myth so popular in the early fourth century. The poet pictured on the Pronomus-Vase as the author of a satyr play is named Demetrius, but the only known dramatist of this period is in fact our comedian. Do we have here that creature, hitherto believed unknown, a poet who wrote both tragedy and comedy?Testimonia
i There have been twenty noteworthy men named Demetrius . . . of poets the first is the one who wrote Old Comedy.
ii [from a second-century AD papyrus containing a list of comic poets and their plays]