A large burrowing South American rodent (Lagostomus
   trichodactylus) allied to the chinchillas, but much larger. Its fur is
   soft and rather long, mottled gray above, white or yellowish white
   beneath. There is a white band across the muzzle, and a dark band on
   each cheek. It inhabits grassy plains, and is noted for its extensive
   burrows and for heaping up miscellaneous articles at the mouth of its
   burrows. Called also biscacha, bizcacha, vischacha, vishatscha.