Passage 6.21.10
ἀπέθανον δὲ ὑπὸ τοῦ Οἰνομάου κατὰ τὰ ἔπη τὰς μεγάλας Ἠοίας Ἀλκάθους ὁ Πορθάονος, δεύτερος οὗτος ἐπὶ τῷ Μάρμακι, μετὰ δὲ Ἀλκάθουν Εὐρύαλος καὶ Εὐρύμαχός τε καὶ Κρόταλος· τούτων μὲν οὖν γονέας τε καὶ πατρίδας οὐχ οἷά τε ἦν πυθέσθαι μοι, τὸν δὲ ἀποθανόντα ἐπʼ αὐτοῖς Ἀκρίαν τεκμαίροιτο ἄν τις Λακεδαιμόνιόν τε εἶναι καὶ οἰκιστὴν Ἀκριῶν. ἐπὶ δὲ τῷ Ἀκρίᾳ Κάπετόν φασιν ὑπὸ τοῦ Οἰνομάου φονευθῆναι καὶ Λυκοῦργον Λάσιόν τε καὶ Χαλκώδοντα καὶ Τρικόλωνον· ἀπόγονον δὲ αὐτὸν εἶναι καὶ ὁμώνυμον Τρικολώνῳ τῷ Λυκάονος λέγουσιν οἱ Ἀρκάδες.
According to the "Great Ehoeae" poem, Alcathous, the son of Porthaon, was killed by Oenomaus. He was the second to perish after Marmax. After Alcathous died, Euryalus, Eurymachus, and Crotalus were also slain. Of the parents and cities of these men, I was unable to obtain information. However, a man named Acrias, who fell after them, one might reasonably consider to have been a Lacedaemonian and the founder of Acriae. After Acrias, they say Capetus was slain by Oenomaus, and then Lycurgus, Lasius, Chalcodon, and Tricolonus. The Arcadians claim that this Tricolonus was the descendant and namesake of Tricolonus, the son of Lycaon.