Same or similar entry, deriving from Pausanias the Atticist, in other lexica: see the references at Photius kappa758 Theodoridis. These are four excellent examples of "serfs" (klaro/tai or klarw=tai: literally men working a plot of land, Doric kla=ros, Attic-Ionic klh=ros), but the initial gloss goes astray. The defining characteristic of groups like these, which differentiated them from chattel-slaves, was that their residence in Herakleia etc. predated that of those who became their masters. See generally e.g. Y. Garlan, Slavery in Ancient Greece (Ithaca NY & London 1988) chapter 2.
[1] cf. epsiloniota 132, epsiloniota 133, epsiloniota 134, epsiloniota 135.
[2] See already kappa 225.