This paper aims to shed new light on the physiognomy of Socrates by comparatively examining Plato's and Xenophon’s passages on the topic. A comparative analysis of these texts is of primary importance for understanding the reception of Socrates’ physiognomy in antiquity, inasmuch as subsequent literary and visual depictions of Socrates almost completely depend on them. The first part of the paper deals with the Silenus motif in Plato and Xenophon: this motif describes a peculiar feature which defines what Socrates is, i.e., his seriocomicness. But Plato and Xenophon also provide other motifs that describe what Socrates does, how he behaves, and which skills he is famous for. These motifs are zoomorphic: Xenophon compares Socrates with a cra...