The Collaborative International Dictionary of English v.0.48:

Statal \Sta"tal\ (st[=a]"tal), a.
   Of, pertaining to, or existing with reference to, a State of
   the American Union, as distinguished from the general
   government. [R.]
   [1913 Webster]

         I have no knowledge of any other kind of political
         citizenship, higher or lower, statal or national.
                                                  --Edward
                                                  Bates.
   [1913 Webster]