The Lex convivalis, also known as the Decretum parasiticum, is a humorous Latin text from late antiquity.

Only a fragment of this work survives, transmitted at the end of the Querolus

Querolus

Querolus or Aulularia is an anonymous Latin comedy from late antiquity, the only Latin drama to survive from this period and the only ancient Latin comedy outside the works of Plautus and Terence.-Title and Origins:...

. Some editors include it in the text of that work, either at the end, as transmitted, or transposed to an earlier point in the last scene. The difference between the metrical character of the two works is against this: the Lex convivalis has metrical clausulae typical of late Latin prose rhythm, while the Querolus has endings that resemble Plautine verse. The text sets out the rights of a parasite (a hanger on) for injuries sustained at a feast, humorously phrased in the formal language of Roman laws.