Scenitae
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
Scēnītæ et Scænītæ, ārum, m. (Σκηνῖται), Scénites [peuple d’Arabie] : Plin. 5, 65 ; 6, 145.