318 MAMMALIA: GLIRES. — XLVIII. 
Hare. Ears about as long as head; fur, in summer, cinnamon 
brown, in winter, becoming white at the surface, plumbeous at 
base, with a median band of reddish brown. L. 20. T. 2}. Ear 3. 
In Evergreen woods. The typical americanus, with ears white 
edged, is found only about Hudson’s Bay, S. to Ontario. Sub- 
spec, virginianus (Harlan), the common form in the U. S. in pine, 
fir, and hemlock forests, Minn. to New Brunswick, S. to Va., has 
the white border of car small or wanting, the median brown band 
broad. Subspec. struthopus Bangs, from Nova Scotia, similar to 
typical virginianus, but having the hind foot much smaller; color 
in summer pelage darker and duller. (orpov6és, a small bird; 
mous, foot.) 
1034. L. campestris Bachman. Jack-Ransit. PRAIRIE 
Hare. Ears much longer than head. Fur pale yellowish gray 
in summer, in winter white at surface and base, yellowish in 
middle ; tail long, all white. L. 23. T. 3}. Ear 5. Kan. and 
Dakota, to Oregon. (Lat., of the fields.) 
Famity CLXXXII. HRETHIZONTIDA. (Tue Ameri- 
CAN PoRCUPINES.) 
Molar teeth 4 on each side; fur more or less mixed with bristly 
barbed spines; tip of muzzle with small hair; tibia and fibula dis- 
tinct. Genera 3, all American. The American Porcupines differ 
in many respects from the Old World Porcupines (Hystricide). 
The former are chiefly arboreal, the latter terrestrial. Allied to 
this family is the South American group of Caviide, represented 
by the Guinea (Guiana) Pig (Cavia aperea). 
a. Tail short, thick, not prehensile; claws 4, long, compressed, and curved; 
nostrils close together. . . . «. «. « « . « « ERETHIZON, 588, 
538, ERETHIZON Frédéric Cuvier. (épeOi¢w, to irritate.) 
1035, B. dorsatus (L.). Canapa Porcupine. Dark brown, 
spines tipped with yellowish white, and 4 to 6 inches long. L. 40. 
T. 6. E.N. Am., from Me. to Penn., formerly common. (Lat., 
dorsum, back.) 
Famity CLXXXIII. DIPODIDA. (Tue Jumrrne Mice.) 
Hind legs greatly elongated, adapted for taking long leaps; fore 
legs short. Tail very long. Molars 4:4 or $3; upper incisors 
compressed, grooved ; molars rooted; internal cheek pouches pres- 
ent; toes 5-5; tibia and fibula united. Genera 6; species numerous; 
one genus, Zapus, chiefly American. 
539. ZAPUS Coues. ({d, an intensive particle ; ods, foot.) 
1036. Z. hudsonius (Zimmermann). Jumprna Mouse. Yel- 
lowish brown ; fur coarse and rough; soles naked. Mbolars #4- 
L. 8 T.5. Ear 4. U.S. chiefly N.; variable. 
