A Smaller History of Rome by William Smith
The name ITALIA was originally applied to a very small tract of country. It was at first confined to the southern portion of Calabria, and was gradually extended northward, till about the time of the Punic wars it indicated the whole peninsula south of the Rivers Rubicon and Macra, the former separating Cisalpine Gaul and Umbria, the latter Liguria and Etruria