leporidæ

from The Century Dictionary.

• A family of mammals of the order Rodentia or Glires and suborder Duplicidentata; the hares.
• Somewhat over 150 species and subspecies of this family have been described, just about one half the number being from North America, where the geographic and climatic conditions are favorable for the production of local races. They have been divided, by Dr. Lyon, into 10 genera: Lepus, Oryctolagus, Sylvilagus, Limnolagus, Brachylagus, Pronolagus, Romerolagus, Nesolagus, Caprolagus, and Pentalagus. The most remarkable of these are Romerolagus, which has long clavicles and resembles the pikas somewhat, and the heavily built Pentalagus from the Loochoo Islands.