The Collaborative International Dictionary of English v.0.48:

Shrievalty \Shriev"al*ty\, n. [Contr. from sheriffalty. See
   Shrieve, n. Sheriff.]
   The office, or sphere of jurisdiction, of a sheriff;
   sheriffalty.
   [1913 Webster]

         It was ordained by 28 Edward I that the people shall
         have election of sheriff in every shire where the
         shrievalty is not of inheritance.        --Blackstone.
   [1913 Webster]