MAMMALS 263 



S. tenellus Merr. Body pale ash gray; white beneath; tail bicolor; 

 length 103 mm.; tail 42 mm.; hind foot 12 mm.; skull very narrow: 

 central California and southward. 



Subspecies of S. tenellus 



S. t. tenellus Merr. Southeastern California. 



S. t. lyelli Merr. Brow^ner;tail darker: Tuolumne county, CaHfornia. 



S. t. myops Merr. Smaller; ears larger; color paler: White Moun- 

 tains, California. 



S. t. nanus Merr. Smaller; color darker : Larimer County, Colorado. 



S. longirostris Bach. Body brown above; length 85 mm.; tail 28 

 mm.; hind foot 10 mm.: Washington, D. C. to Georgia; westward to 

 southern Illinois; in swamps and wet places. 



S. fisJieri Merr. Color chestnut brown; length 108 mm.; tail ;^;^ 

 mm.; hind foot 12 mm.: Dismal Swamp, Virginia. 



S. pacifidts Coues. Color cinnamon rufous; length 150 mm.; tail 

 63 mm.; hind foot 17 mm.: coastal region of northern CaHfornia and 

 southern Oregon. 



S. leucogenys Osgood. Color brownish drab; length 107 mm.; tail 

 2)^ mm.; hind foot 12 mm.: Beaver County, Utah. 



2. Neosorex Baird. Similar to Sorex; hind feet adapted to swim- 

 ming, being very long and broad and fringed with bristles; toes also 

 fringed, the third and fourth united at base and slightly webbed: 

 5 species, 4 in the United States. 



Key to the Species of Neosorex 



ai In the north-central States N. palustris. 



a2 In the northeastern States N. albiharbis. 



a3 In the Rocky Mountain and Pacific States. 



bi In the Rockies and the Sierra Nevadas N. navigator. 



b2 In western Oregon and Washington N. bendiri. 



N. palustris (Richardson). Color seal brown; gray beneath; 

 length 157 mm.; tail 68 mm.; hind foot 20 mm.: central Minnesota to 

 the Rockies; northward to Hudson Bay; in marshy places. 



A'', albibarbis Cope. Marsh shrew (Fig. 146). Body blackish slate 

 in color, sparingly mixed with white tipped hairs, and dusky beneath; 

 length 154 mm.; tail 70 mm.; hind foot 19 mm.: eastern North America 

 from the Pennsylvania mountains to Labrador; not common; in swamps 

 and wet fields and woods; Hudsonian and Canadian zones. 



N. navigator Baird. Body plumbeous above, whitish beneath; 

 length 150 mm.; tail 72 mm.; hind foot 20 mm.: Rocky Mountains from 



