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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
The supreme administration of the new province was entrusted to a Roman governor, who had his seat at Utica. Its frontier did not need any regular defence, as the allied Numidian kingdom everywhere separated it from the inhabitants of the desert. In the matter of taxes Rome dealt on the whole with moderation. Those communities which from the beginning of the war had taken part with Rome--viz. Only the maritime towns of Utica, Hadrumetum, Little Leptis, Thapsus, Achulla, and Usalis, and the inland town of Theudalis-- retained their territory and became free cities; which was also the case with the newly-founded community of deserters. The territory of the city of Carthage--with the exception of a tract presented to Utica--and that of the other destroyed townships became Roman domain- land, which was let on lease.
The remaining townships likewise forfeited in law their property in the soil and their municipal liberties; but their land and their constitution were for the time being, and until further orders from the Roman government, left to them as a possession liable to be recalled, and the communities paid annually to Rome for the use of their soil which had become Roman a once-for-all fixed tribute (stipendium), which they in their turn collected by means of a property-tax levied from the individuals liable. The real gainers, however, by this destruction of the first commercial city of the west were the Roman merchants, who, as soon as Carthage lay in ashes, flocked in troops to Utica, and from this as their head-quarters began to turn to profitable account not only the Roman province, but also the Numidian and Gaetulian regions which had hitherto been closed to them.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=67