Passage 2.18.5
τὸ δὲ ἐγχώριον γένος οἱ Ἀναξαγορίδαι βασιλεύουσι πλέον. Ἶφις μὲν γὰρ ὁ Ἀλέκτορος τοῦ Ἀναξαγόρου Σθενέλῳ τῷ Καπανέως ἀδελφοῦ παιδὶ ἀπέλιπε τὴν ἀρχήν· Ἀμφιλόχου δὲ μετὰ ἅλωσιν Ἰλίου μετοικήσαντος ἐς τοὺς νῦν Ἀμφιλόχους, Κυανίππου δʼ ἄπαιδος τελευτήσαντος, οὕτω Κυλαράβης ὁ Σθενέλου μόνος τὴν βασιλείαν ἔσχεν. οὐ μέντοι παῖδας κατέλιπεν οὐδʼ οὗτος, ἀλλὰ Ὀρέστης ὁ Ἀγαμέμνονος τὸ Ἄργος κατέσχε παροικῶν τε ἐγγὺς αὐτῷ καὶ ἄνευ τῆς πατρῴας ἀρχῆς προσπεποιημένος μὲν Ἀρκάδων τοὺς πολλούς, παρειληφὼς δὲ καὶ τὴν ἐν Σπάρτῃ βασιλείαν, συμμαχικοῦ δὲ ἐκ Φωκέων ἀεί ποτε ἐπʼ ὠφελείᾳ ἑτοίμου παρόντος.
The native royal line is mostly ruled by the family of the Anaxagoridae. For Iphis, the son of Alector, son of Anaxagoras, left the kingship to Sthenelus, son of Capaneus' brother. After Amphilochus moved following the fall of Troy into the region now called Amphilochia, and after Cyanippus died childless, thus Cylarabes son of Sthenelus alone held the royal power. However, he too left no children, so Orestes, son of Agamemnon, obtained Argos, living in proximity and not possessing his hereditary rule, but commanding the allegiance of many Arcadians, having also acquired the kingship at Sparta, while always having at hand a ready alliance with the Phocians for support.