ATITERIS. This person appears in company with those who play flutes, pipes, and horns in The House of Fame. Robinson and Skeat suggest that Chaucer means Tityrus, an old shepherd who plays the reed pipes in Virgil's Eclogues I and VI. Since, in Fame's house, Atiteris stands with Pseustis, a flute player representing paganism in the anonymous tenth-century poem Ecloga Theoduli, it is more likely that Chaucer means Alethia. Alethia represents Christianity in the Ecloga Theoduli and enters a contest with Pseustis, who loses to her.
Atiteris and Pseustis stand with Marsyas, who lost a contest to Apollo, HF III.1227-1229. [Apollo: Marcia: Pseustis]
The name appears in final rhyming position, HF III.1227.