Passage 8.18.7
ὑπὲρ δὲ τὴν Νώνακριν ὄρη τε καλούμενα Ἀροάνια καὶ σπήλαιόν ἐστιν ἐν αὐτοῖς. ἐς τοῦτο ἀναφυγεῖν τὸ σπήλαιον τὰς θυγατέρας τὰς Προίτου μανείσας λέγουσιν, ἃς ὁ Μελάμπους θυσίαις τε ἀπορρήτοις καὶ καθαρμοῖς κατήγαγεν ἐς χωρίον καλούμενον Λουσούς. τοῦ μὲν δὴ ὄρους τῶν Ἀροανίων Φενεᾶται τὰ πολλὰ ἐνέμοντο· οἱ δὲ ἐν ὅροις ἤδη Κλειτορίων εἰσὶν οἱ Λουσοί.
Above Nonacris are mountains called the Aroania, and there is a cave among them. They say it was to this cave that the daughters of Proetus fled when they were driven mad, and that Melampus brought them down from there by means of secret sacrifices and purifications, leading them to a place called Lousoi. Most of the Aroanian mountain was occupied by the Pheneatians, but Lousoi is already in the territory bordering Kleitor.