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
prŏmoscĭda Isid. Orig. 12, 2, 14, et prŏmoscis Sol. 24, 14, c. proboscis.
promoscida, ae, f., s. proboscis.