this is a caricature of "Tragala" a character in the play Vingt ans plus tard (twenty years later). daumier is depicting the King Louis-Philippe as the actor emmanuel lepeintre in his role (Tragala) in the play. the big belly of the artist represented a perfect similarity to the king's own figure. now the king wears the uniform of a police-officer (chef des alguazils).
study of faces (daumier would use these for his political lampooning)
daumier, past, present, future
more of daumier here.