The Geography of Strabo, Vol. III (Loeb)

...the same boundary that I have assigned to the Brettian territory—the River Laüs. On the Sicilian Sea, he marks Metapontium as the boundary. He names the country of the Tarantini, which borders on Metapontium, as outside of Italy, calling its inhabitants Iapyges. In more remote times, he said, the names "Italians" and "Oenotrians" were applied only to the people living inside the isthmus, sloping toward the Sicilian Strait. C 255 The isthmus itself is one hundred and sixty stadia wide, lying between two gulfs: the Hipponiate (which Antiochus has called Napetine) and the Scylletic. The coasting voyage around the country between the isthmus and the Strait is two thousand stadia. After this, he says the name of "Italy" and the "Oenotrians" extended as far as the territory of Metapontium and Seiris; for, he adds, the Chones, a well-regulated Oenotrian tribe, had taken up their abode in these regions and called the land Chone. Antiochus spoke in a rather simple and ancient way, without distinguishing between the Lucanians and the Brettii. Lucania lies between the Tyrrhenian and Sicilian coastlines—the former from the River Silaris to Laüs, and the latter from Metapontium to Thurii. On the mainland, it stretches from the Samnites to the isthmus that reaches from Thurii to Cerilli, near Laüs; the isthmus is three hundred stadia wide. Beyond these are the Brettii, who live on a peninsula, and within this, another peninsula is included...