jack rabbit

Webster's Dictionary (1913)

Zoology, any one of several species of large American hares, having very large ears and long legs. The California species (Lepus Californicus), and that of Texas and New Mexico (Lepus callotis), have the tail black above, and the ears black at the tip. They do not become white in winter. The more northern prairie hare (Lepus campestris) has the upper side of the tail white, and in winter its fur becomes nearly white.

From the entry Jack.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54