"Bonum facinus": Catull. 66.25-28 tra Igino e Giustino

The article deals with the exegesis of Catullus 66.25-28. Its first part considers the importance of a passage of Hyginus in the history of the interpretation of Catullus' verses from the XVIth to the XIXth century. The second part studies the relevance in this context of Iustinus 26.3, as discovered by a forgotten proposal of E.Q. Visconti (1751-1818), seen in relation to some other personalities of the literary world in early XIXth century Milan.