Servius's note on Inuus is prompted by the mention of Castrum Inui at Aeneid 6.77:
| “ | This is one and the same as the town (civitas) in Italy which is called New Fort (Castrum Novum). Vergil says 'Fort Inuus' for the place, that is, 'Fort Pan', who has a cult there. He is called Inuus, however, in Latin, Πάν (Pan) in Greek; also Ἐφιάλτης (Ephialtes), in Latin Incubus; likewise Faunus, and Fatuus, Fatuclus. He is called Inuus, however, from going around having sex everywhere with all the animals, hence he is also called Incubus. | ” |
Castrum Novum is most likely Giulianova on the coast of Etruria, but Servius seems to have erred in thinking that Castrum Inui, on the coast of Latium, was the same town.
Rutilius makes the same identification as Servius, but explains that there was a stone carving of Inuus over the gate of the town. This image, worn by time, showed horns on its "pastoral forehead", but the ancient name was no longer legible. Rutilius is noncommittal about its identity, "whether Pan exchanged Tyrrhenian woodlands for Maenala, or whether a resident Faunus enters (init) his paternal retreats," but proclaims that "as long as he revitalizes the seed of mortals with generous fertility, the god is imagined as more than usually predisposed to sex."
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