Dolichotis Patagonicus

from The Collaborative International Dictionary of English v.0.48

Mara \Ma"ra\, n. (Zool.)
   The Patagonian cavy, a hare-like rodent ({Dolichotis
   patagonum} or {Dolichotis Patagonicus}) of the pampas of
   Argentina.
   [1913 Webster]