﻿Dec, 1895.] 



SOREX ALBIBARBIS„ 



93 



Measurements. — -Baircrs uiejisurements of tlie alcoholic type specimen 

 are, ai)proximately : Total length, 127 mm.; tail vertebrai, 72mm.; hiud 

 foot, 20 mm. The total lengtli is much too small, due to the contraction 

 of the body in alcohol. Average of 8 specimens from Pryor Mountains, 

 Montana: Total length, 148.4 mm.; tail vertebrai, 71.5 mm.; hind foot, 

 20.4 mm. Average of 12 specimens from Cottonwood Meadows, Mount 

 Whitney, California: Total length, 159.2 mm.; tail vertebrae, 76 mm.; 

 hind foot, 20.2 mm. 



General remarks . — Neosorex navigator fluctuates cousiderably in size 

 in the various mountain ranges it inhabits, and seems to intergrade 

 completely with S. palustris. Specimens from the Bighorn and Wind 

 Eiver mountains in Wyoming are fairly intermediate, and it is prob- 

 able that inter grades will be found along the east base of the Eocky 

 Mountains in Alberta. Typical palustris occurs on the plains at 

 Edmonton, Alberta, while unmistakable navigator is found in the Rocky 

 Mountains at Banff and Henry House, Alberta. 



The palate is relatively narrower in the type specimen; broader in 

 specimens from most parts of the Rocky Mts. and the Sierra Nevada. 



Specimens examined. — Total number, 77, from the following localities: 

 British Columbia : Nelson^ 3. 



Alberta: Banff, 2; Heury House, Rocky Mountains, 1. 



Montana: Pryor Mouutahis, 8; Upper Stillwater Lake, 1; Flathead Lake, 5; 

 Paola (Great Northern Railroad), 1 ; St. Marys Lakes, 1 ; Bear Tooth Mountains, 1 ; 

 Red Lodge, 3. 



Idaho : Head of Crow Creek, 1 ; Head of Wood River, 1 ; Salmon River Moun- 

 tains, 5; Birch Creek, 6; Saw Tooth Lake, 3. 



Wyoming: Bighorn Mountains, 1; Wind River Mountains, 2. 



Utah: Wasatch Mountains, 6; Park City, L 



Colorado: Gold Hill, Boulder County, 2; Cochetope Pass, 1. 



California (Sierra Nevada): Upper Cottonwood Meadows (near Mount Whit- 

 ney), 12; Independence Creek, 2; Sequoia National Park, 3; Lone Pine, 5. 



SOREX (NEOSOREX) ALBIBARBIS (Cope). 



Neosorex alUbarhis Cope, Proc. Acad. 'Nat. Sci. Phila., 188-189, 1862. 

 Sorex alhiharhis Merriam, Proc. Biol. Soc. Wash., YII, 25, April, 1892. 



Miller, Proc. Bost. Soc. Nat. Hist., XXVII, March 24, 1894. 



Tyije locality. — Profile Lake, Franconia Mountains, New Hampshire. 



Geographic distribution. — Boreal parts of eastern North America 

 from mountains of Pennsylvania and New York northward to Labrador. 



General characters.— ^imild^v to 8. palustris \\i size and general appear- 

 ance, but with under parts strongly clouded with dusky. 



C^oZor.— Upper parts blackish slate very sparingly mixed with light- 

 tipped hairs ; chin whitish or grayish, rest of under parts heavily clouded 

 with dusky, the intensity varying with the season. Tail bicolor : black- 

 ish above and all round near tip, whitish below on basal half or two- 

 thirds. 



Cranial and dental characters.— ^YvlW and teeth similar to those of 

 B. palustris, but slightly smaller. The anterior unicuspid s are narrower, 



