See Dal Zotto1903, 35-38, esp. 37, and De Gianni 2010, esp. 41, who is apparently unaware of Dal Zotto’s study.
Baehrens1872, 845. Though before Baehrens, Schenkl (1867, 790) had already proposed: quoniam tibi me non dicere, nutrix, | non sinis.
Lyne1978, 214. Indeed, H2’s tu nunc would be an easy correction of H’s tunc; alternatively, if H2 actually had access to a lost branch of the manuscript tradition as Lyne (1978, 57) speculates, tununc may be an independent corruption of tumme.