In Catullus 50, after an enjoyable day writing poetry with Licinius Calvus, the poet warns his friend not to ignore him lest Nemesis punish him for it, ne poenas Nemesis reposcat a te (‘lest Nemesis demand punishment from you’). It will be proposed in this article that, in keeping with neoteric ideals, Catullus is playing on the phrase a te to create a bilingual pun on the Greek word ἄτη ‘delusion’, ‘mental blindness (often divinely sent)’.