I analyze two passages of the Ars Prisciani from the books on the pronoun (XII and XIII) in which the relationship between a citation and its grammatical context is problematic. Frg. Coel. hist. 37 Peter is cited in four passages of the Ars: three times including the words "alius modi", once with "alii modi". I propose to print "alius modi" in the editions of Coelius Antipater, but I argue that the only occurrence of the fragment with "alii modi" is due to an authorial error. I then discuss Plin. Dubius sermo frg. 7, in which a verbatim citation is wrongly attributed to Cicero's Orator. I discuss the possible origin of this confusion and conclude that this is another authorial error, that likely originated through an intermediate grammatical source of Priscian, possibly Caper.

These are the materials of a conference talk. File 'handout.pdf' is the version of the handout I distributed at the conference. I also uploaded a longer version of it: 'handous_esteso.pdf'. The two .ods files include tables that I used to prepare the talk.