Homer's birthplace: 'a well-known epigram'

A.C. Price quotes an epigram in 'Introduction:
§ 1. History of the Poems' in his edition of Iliad 21 (CUP. 1921: 5).

'A well-known epigram runs thus:

ἑπτὰ πόλεις διερίζουσιν περὶ ῥίζαν Ὁμήρου
Σμύρνα, ῾Ρόδος, Κολόφων, Σαλαμίν, Ἴος, Ἄργος, Ἀθῆναι,

but at least twenty cites claimed Homer has their own.'

This epigram cannot be found through the TLG, but LSJ s.v. διερίζω notes 'interpol. in Epigr. in Gell.3.11'.

Aulus Gellius, Noctes Atticae 3.11.6-7 reads:
De patria quoque Homeri multo maxime dissensum est. Alii Colophonium, alii Smyrnaeum, sunt qui Atheniensem, sunt etiam qui Aegyptium fuisse dicant, Aristoteles tradidit ex insula Io. M. Varro in libro de imaginibus primo Homeri imagini epigramma hoc apposuit: 
capella Homeri candida haec tumulum indicat, 
quod hac Ietae mortuo faciunt sacra.

The OCT app.crit. makes no mention of this interpolation, but thanks to the wonders of Googlebooks, it can be seen in an eighteeneth-century translation.

For Ios, see Anth.7.2 (Antipater of Sidon).