Pisauri: Pisaurum (now Pesaro) was an Umbrian town on the Adriatic planted as a Roman colony B.C. 184 (cf. Liv. 39.44). Plutarch (Plut. Ant. 60) reports that the town was swallowed up by an earthquake just before the battle of Actium. The previous settlement there of a number of military colonists by Antony (Plut. l.c.) may have been an attempt to check the decay (moribunda sede) noted by Catullus.
 inaurata statua: gilded statues were common in Rome at a later date, the second supplement to the Notitia (written in the first half of the fourth century A.D.) mentioning eighty of gods alone. This number is understood to be exclusive of statues in temples and other shrines. With the comparison cf. Catul. 64.100n.
 nescis: etc. perhaps the idea is that Nemesis will avenge the slighted love of Catullus (cf. Catul. 50.20n.), or simply that Catullus by great and continued kind services has a strong claim upon the gratitude and affection of Juventius. But the offense of slighting love was often exaggerated by the poets. With facinus faciascf. Catul. 110.4n.