The goal of this article is to propose an interpretative strategy for Casta Painting as a genre painting case. Discussing several bonds between Ancien Regime rhetorics and genre painting developments, the article pays specific attention to Aristotle's categories and Prime Modernity rhetors prescriptions for Satire and Comedy, we focus on the figure disposition on pictorial surface as a rhetoric example of image composition. Finally, the article pays attention to rhetoric resources identified in Jose Joaquin Magon 's most discussed costa painting series in Museo de Historia Mexicana de Monterrey, Mexico.