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
There he amply retaliated on his general the wrong which he had suffered, by criticising before the gaping multitude the conduct of the war and the administration of Metellus in Africa in a manner as unmilitary as it was disgracefully unfair; and he did not even disdain to serve up to the darling populace--always whispering about secret conspiracies equally unprecedented and indubitable on the part of their noble masters-- the silly story, that Metellus was designedly protracting the war in order to remain as long as possible commander-in-chief.
To the idlers of the streets this was quite clear: numerous persons unfriendly for reasons good or bad to the government, and especially the justly-indignant mercantile order, desired nothing better than such an opportunity of annoying the aristocracy in its most sensitive point: he was elected to the consulship by an enormous majority, and not only so, but, while in other cases by the law of Gaius Gracchus the decision as to the respective functions to be assigned to the consuls lay with the senate (p. 355), the arrangement made by the senate which left Metellus at his post was overthrown, and by decree of the sovereign comitia the supreme command in the African war was committed to Marius.
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Reference address : https://www.ellopos.net/elpenor/rome/4-04-rule-restoration.asp?pg=52