πεμφρηδών
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
English (LSJ)
όνος, ἡ, a kind of
A wasp that builds in hollow oaks, Nic. Al.183 (cf. Sch.), Th. 812 ; cf. τενθρηδών, ἀνθρηδών.