Two lexica to Plato have survived from Antiquity: the epitome of Timaeus and the so-calledPseudo-Didymus. This is the first critical edition of these lexica relying on a complete survey of their textual traditions, both direct and indirect, which are investigated in the Italian prefaces; it is also provided with an up-to-date picture of Timaeus, with an extensive inquiry into his sources and with an analysis of the mutual relationships between the two works. The critical text is provided with a threefold apparatus and detailed indexes.

This publication provides a new critical edition of the scholia to Hippolytus with an apparatus of loci similes. The introduction briefly discusses the exegesis and the critical interpretation of the Euripidean text in antiquity as well as the creation and development of this scholiastic corpus.