MAMMALS 351 



S. palustris (Bach.). Marsh rabbit; pontoon. Body rather large 

 and yellowish or reddish brown in color; beneath gray; legs short; 

 length 436 mm.; tail t^^ mm.; hind foot 91 mm.: under side of tail gray, 

 sometimes brownish: coastal portions of the southern States from 

 Dismal Swamp to Mobile Bay; in swampy woods; habits aquatic, the 

 animals taking very readily to water and swimming well. 



Subspecies of S. palustris 



S. p. paludicola (Miller and Bangs). Color dark reddish brown: 

 peninsular Florida. 



5. aquaticus (Bach.). Swamp rabbit; cane-cutter. Color grayish 

 brown; under side of tail pure white; length 550 mm.; tail 60 mm.; 

 hind foot 106: river bottoms from western Georgia to central Texas and 

 Oklahoma; northward to Tennessee and central Arkansas and in the 

 Mississippi and Ohio River bottoms to Illinois. 



Subspecies of S. aquaticus 



S. a. Utter alls Nel. Color much darker and reddish: narrow coast 

 belt from Mississippi to Matagorda Bay, Texas. 



3. Brachylagus Miller. Size small; ears short; tail very small and 

 nearly unicolor: i species. 



B. idahoensis (Merriam). Color drab or pinkish drab in winter and 

 hair very long and soft; color in summer brownish gray; length 291 

 mm.; tail 18 mm.; hind foot 71 mm.: sagebrush plains of southern 

 Idaho and Oregon and northern and central Nevada; makes its own 

 burrows in the ground, being the only American rabbit or hare to do so. 



Family 10. Ochotonidae. — Pikas. Small compact rodents with 

 short legs and without external tail; skull depressed; molars rootless; 

 clavicles well developed: about 26 species, in Europe, Asia and 

 America. 



Ochotona Link. Dentition 2/1, 0/0, 2/2, t^/t,: about 26 species 

 and subspecies in the United States, which live in the high western 

 mountains from Alaska to New Mexico, mainly above timber line, 

 feeding upon herbage, of which they collect large winter stores; they 

 do not hibernate ; a single litter of from 2 to 4 young raised annually. 



0. prince ps Richardson. Body stout, with short fore and hind legs; 

 toes 5-4; palms and soles densely haired; color gray or buff and variable; 

 under parts whitish; length 190 mm.; hind foot 30 mm.: Rocky Moun- 

 tains; Cascades; Sierra Nevadas; 16 subspecies. 



