320 VERTEBRATE ANIMALS OF THE UNITED STATES 



Carolina; westward to Michigan and Kansas; in woody marshes and 

 swamps; Boreal and Transition zones; rare. 



S. fatuus Bangs. Similar to S. cooperi, but with narrower upper 

 incisors and a smaller skull: Maine and New Hampshire, and northward. 

 S. helaletes Merriam. Similar to S. cooperi, but with larger feet and 

 a longer tail : Dismal Swamp, Virginia. 



5. sphagnicola Preble. Color sepia brown mixed with black; 

 under parts grayish white; length 132 mm.; tail 17 mm.; hind foot 17 

 mm. : Mount Washington, New Hampshire. 



6. Phenacomys Merriam. Similar to Microtus; 

 -^"•^^ molars with 2 roots (Fig. 169) and large and strong; 



^''^ ■'' ,' Mjk/ front teeth without grooves; body short and thick; 

 m,, Im tail short; ears just appearing above the fur: 9 species, 

 mV.!'^^ all North American; 6 species in the United States. 



kw/ "^^ p. latimanus Merriam. Color yellowish brown 



/Jj y \m above, whitish below ; face suffused with reddish ; length 



150 mm.; tail 35 mm.; hind foot 20 mm.: Labrador to 

 the north shore of Lake Superior. 



P. orophiliis Merr. Mountain lemming. Color 

 light grayish brown, tinged with yellow; whitish below; 

 feet pure white; length 146 mm.; tail 38 mm.; hind 

 foot 19 mm. : Rocky Mountains from British Columbia 

 to New Mexico; westward to central Oregon; Canadian 

 zone; similar in habits to Microtus. 



P. olympicus Elliot. Like P. orophilus, but smaller, 

 darker and with a longer tail: Olympic Mountains, 

 Washington. 



P. preblei Merr. Like P. orophilus, but more 

 ochraceous: Longs Peak, Colorado. 



Fig. 172. — Syria p- • i i i 



tomys cooperi {after P. alhipcs Merr. Color grizzled brown; grayish 

 stone b' Cram). beneath; feet white; length 168 mm.; tail 62 mm.; 



hind foot 19 mm.: Humboldt County, California. 



P. longicaudus True. Color bright rusty brown; feet brown, length 

 148 mm.: coniferous forests of western Oregon and northwestern 

 CaUfornia. The mouse is arboreal in habits, building a large nest of 

 twigs from 30 to 100 feet from the ground in which it raises several 

 litters of young a year, numbering from i to 4 each. 



7. Evotomys Coues. Red-back mice. Body small and reddish in 

 color, with a short tail; molars rooted, and small and weak, the lower 

 incisors extending along the outer side of them; incisors without grooves: 

 circumpolar; about 6 species in the United States, which nest in under- 



