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(Zoöl.), a South African rodent (Pedetes Caffer), allied to the jerboa. --
Jumping louse(Zoöl.), any of the numerous species of plant lice belonging to the family Psyllidæ, several of which are injurious to fruit trees. --
Jumping mouse(Zoöl.), 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(Zoöl.), gray mullet. --
Jumping shrew(Zoöl.), any African insectivore of the genus Macroscelides. They are allied to the shrews, but have large hind legs adapted for jumping. --
Jumping spider(Zoöl.), spider of the genus Salticus and other related genera; one of the Saltigradæ; -- so called because it leaps upon its prey.