The Collaborative International Dictionary of English v.0.48:

Rusticity \Rus*tic"ity\, n. [L. rusticitas: cf. F.
   rusticit['e].]
   The quality or state of being rustic; rustic manners;
   rudeness; simplicity; artlessness.
   [1913 Webster]

         The sweetness and rusticity of a pastoral can not be so
         well expressed in any other tongue as in the Greek,
         when rightly mixed and qualified with the Doric
         dialect.                                 --Addison.
   [1913 Webster]

         The Saxons were refined from their rusticity. --Sir W.
                                                  Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rusticity
    n 1: the quality of being rustic or gauche [syn: rusticity,
         gaucherie] [ant: urbanity]