Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
To these fell to be added the colonies
instituted by Rome and the Latin league; Ardea in the former territory
of the Rutuli, and Satricum, Velitrae, Norba, Signia, Setia and
Circeii in that of the Volsci. Besides, seventeen other townships,
whose names are not known with certainty, had the privilege of
participating in the Latin festival without the right of voting.
On this footing--of forty-seven townships entitled to participate and
thirty entitled to vote--the Latin confederacy continued henceforward
unalterably fixed. The Latin communities founded subsequently, such
as Sutrium, Nepete,(16) Antium, Tarracina,(17) and Gales, were not
admitted into the confederacy, nor were the Latin communities
subsequently divested of their autonomy, such as Tusculum and
Lanuvium, erased from the list.