Measurements. Total length, 255; tail vertebra:', 155: hind 

 foot, 35. 



398. nevadensis. {Zapus), Preble, N. Am. Faun., 1899, No. 15, 



P- 25- 



Type locality. Ruby Mountains, Nevada. 



Geogr. Distr. Known from tj'pe locality only. 



Genl. Char. Large, color pale. 



Color. Dorsal area pale yellowish brown, lined with black; side 

 pale ochraceous buff; cheeks buffy white mixed with black; beneath 

 pure white. 



Measurements. Total length, 242; tail vertebra', 150; hind 

 foot, 33. 



399. trinotatus. (Zapus), Rhoads, Proc. Acad. Nat. Scien. Phil., 



1894, p. 421. 



imperator, Elliot, Pub. Field Columb. Mus., 1899, i, p. 228, 

 Zoology. 



Type locality. Lulu Island, mouth of Fraser River, British Co- 

 lumbia. 



Geogr. Distr. Coast region of southern British Columbia, Wash- 

 ington, Oregon west of Cascade Mountains, northern California to 

 Humboldt Bay. 



Genl. Char. Large, color bright. 



Color. Summer. Above brownish black and buff; sides yellow- 

 ish buff, sparsely streaked with black; inner side of legs, feet and 

 under parts pure white. Tail, dark brown above, white beneath. 



Measurements. Total length, 241; tail vertebrae, 141; hind foot, 

 28. (Spec, from Olympic Mts.) 



a.—alleni. {Zapus), Elliot, Pub. Field Columb. Mus., 1898, i. p. 212, 

 Zoology. 



Type locality. Pyramid Peak, Lake Tahoe, California. 



Geogr. Distr. Mount Shasta southward in Sierra Nevada to 

 Monmouth and north fork of Kern River, California. 



Genl. Char. Similar to Z. trinotatus, color lighter; skull smaller. 

 Tip of tail white. 



Color. Above brownish black lined with deep fulvous; sides, 

 outside of fore legs, thighs and rump, bright orange yellow sparsely 

 lined with black. Under parts, hind legs and feet pure white. Tail, 

 brown above, white beneath and white at tip. 



Measurements. Total length, 234; tail, 143; hind foot, 32; 

 ear, 14. 



