Note 54 — LIFE OF CAIUS MARIUS.
George Long translation
This is probably a corrupt name. The territory of Arpinum, now Arpino, was in the Volscian mountains. Arpinum was also the birth-place of Cicero. Juvenal in his rhetorical fashion (Sat. viii. 245) represents the young Marius as earning his bread by working at the plough as a servant and afterwards entering the army as a common soldier.