The Collaborative International Dictionary of English v.0.48:

Exceptious \Ex*cep"tious\, a.
   Disposed or apt to take exceptions, or to object; captious.
   [Obs.]
   [1913 Webster]

         At least effectually silence the doubtful and
         exceptious.                              --South.
   -- Ex*cep"tious*ness, n. [Obs.] --Barrow.
   [1913 Webster]