Final answer:
Cacus in Canto XXV is depicted as a centaur, a creature known for his thievery and punished in Dante's depiction of Hell within the Divine Comedy.
Step-by-step explanation:
In Canto XXV of Dante's Divine Comedy, Cacus is depicted as a centaur. The Canto is part of the Inferno section, where Dante journeys through Hell. Cacus is portrayed as a monstrous creature known for his thievery and is punished in the seventh circle where thieves are tormented. This is an allusion to Roman mythology where Cacus was a fire-breathing giant and the son of Vulcan. In the context of Dante's work, Cacus' form as half-human, half-beast is symbolic of the dual nature of his sins, combining human intelligence with animalistic behavior.