Passage 4.1.5
πρῶτοι δʼ οὖν βασιλεύουσιν ἐν τῇ χώρᾳ ταύτῃ Πολυκάων τε ὁ Λέλεγος καὶ Μεσσήνη γυνὴ τοῦ Πολυκάονος. παρὰ ταύτην τὴν Μεσσήνην τὰ ὄργια κομίζων τῶν Μεγάλων θεῶν Καύκων ἦλθεν ἐξ Ἐλευσῖνος ὁ Κελαινοῦ τοῦ Φλύου. Φλῦον δὲ αὐτὸν Ἀθηναῖοι λέγουσι παῖδα εἶναι Γῆς· ὁμολογεῖ δέ σφισι καὶ ὕμνος Μουσαίου Λυκομίδαις ποιηθεὶς ἐς Δήμητρα.
The first to reign in this land were Polycaon, the son of Lelex, and his wife Messene. In Messene's time, Caucon, son of Celaenus and originating from Eleusis, arrived carrying the sacred rites of the Great Goddesses. Celaenus was the son of Phlyus, and the Athenians claim that Phlyus was himself the offspring of Earth. This is confirmed by a hymn composed by Musaeus in honor of Demeter for the Lycomidae.