zapodidæ

from The Century Dictionary.

• noun A family of rodent mammals, of the myomorphic series of the order Rodentia, framed by Coues for the reception of the jumping mouse of North America, Zapus hudsonius, a small mouse-like quadruped intermediate in some respects between the Muridæ, or mice proper, and the Dipodidæ, or jerboas of the Old World.