jumping mouse
    n 1: any of several primitive mouselike rodents with long hind
         legs and no cheek pouches; of woodlands of Eurasia and
         North America

Jumping \Jump"ing\, p. a. & vb. n.
   of Jump, to leap.
   [1913 Webster]

   Jumping bean, a seed of a Mexican Euphorbia, containing
      the larva of a moth (Carpocapsa saltitans). The larva by
      its sudden movements causes the seed to roll to roll and
      jump about.

   Jumping deer (Zool.), a South African rodent (Pedetes
      Caffer), allied to the jerboa.

   Jumping louse (Zool.), any of the numerous species of plant
      lice belonging to the family Psyllid[ae], several of
      which are injurious to fruit trees.

   Jumping mouse (Zool.), North American mouse (Zapus
      Hudsonius), having a long tail and large hind legs. It is
      noted for its jumping powers. Called also kangaroo
      mouse.

   Jumping mullet (Zool.), gray mullet.

   Jumping shrew (Zool.), any African insectivore of the genus
      Macroscelides. They are allied to the shrews, but have
      large hind legs adapted for jumping.

   Jumping spider (Zool.), spider of the genus Salticus and
      other related genera; one of the Saltigrad[ae]; -- so
      called because it leaps upon its prey.
      [1913 Webster]