Vulpes velox

from WordNet (r) 3.0 (2006)

Vulpes velox
    n 1: small grey fox of the plains of western North America [syn:
         {kit fox}, {prairie fox}, {Vulpes velox}]

from The Collaborative International Dictionary of English v.0.48

kit \kit\, n. [See {Kitten}.]
   A kitten.
   [1913 Webster]

   {Kit fox} (Zool.), a small burrowing fox ({Vulpes velox}),
      inhabiting the region of the Rocky Mountains. It is
      brownish gray, reddish on the breast and flanks, and white
      below. Called also {swift fox}.
      [1913 Webster]