Same entry in other lexica. The headword is nominative plural of the adjective ἄγραυλος (see generally LSJ s.v.) and is quoted either from Homer, Odyssey 10.410 (heifers) or from Hesiod, Theogony 26 (shepherds) -- both of which have glosses, in their scholia, very like the present one.
[1] Or: "in the countryside".