﻿Dec, 1895.] 



SOREX AMCENUS. 



69 



tions of dohso7ii and ohsctcrus are intricate and perplexing. The two 

 animals resemble one another very closely, but no intergrades have 

 been found, and each has, so far as known, an independent distribu 

 tion. They are best distinguished by the size of the teeth, the meas- 

 urements of which are given under S. obscurus (p. 72). In the type 

 specimen the third unicuspidate tooth is abnormally large. 



Specimens examined, — Total number, 46, from the following localities: 



Idaho : Alturas Lake (type locality), 7 ; MuUan, 2 ; Osburn^ 1 ; Coeur d'Alene, 2 ; 

 Seven Devils Moimtalns, 1. 



Montana: Pryor Mountains, 5; Big Snowy Mountains, 4; Tobacco Plains, 1; 

 Flathead Lake, 6; Nyack, 1; Summit (Great Northern Railroad), 2; Prospect 

 Creek, near Thompson, 3; Thompson Pass, 2. 



Wyoming: Bighorn Mountains, 4; Le Barge Creek (Wyoming Range), 1. 



Utah: Ogden, 4. 



SOREX VAGRANS MONTICOLA Merriam. 

 Sorex monticolus Merriam, N. Am. Fauna, No. 3, 43-44, September 11, 1890. 



Type locality.— Q^n Francisco Mountain, Arizona (altitude, 3,500 

 meters — 11,500 feet). 



General characters. — Size, small; pelage short; third unicuspid much 

 smaller than fourth. Similar to S. vagrans in size and general appear- 

 ance, but color grayish brown instead of chestnut brown ; teeth broader. 



C'o^or.— Upper parts pale sepia brown without chestnut tinge, under 

 l)arts ashy gray ; tail bicolor : brownish above, whitish beneath except 

 near tip, which is dark all round. 



Cranial and dental characters. — Skull similar to that of vagrans, but 

 slightly shorter (the shortening postrostral) ; palate and constriction 

 between brain case and rostrum broader ; unicuspids and molariform 

 series broader. 



Measurements. — Average of 4 specimens from type locality: Total 

 length, 108 mm. ; tail vertebrse, 44.2 mm. ; hind foot, 12.7 mm. Average 

 of 4 from Ohiricahua Mountains, Arizona: Total length, 110 mm.; tail 

 vertebrje, 47.5 mm.; hind foot, 12.2 mm. 



General remarlzs. — Sorex monticola is only a slightly differentiated 

 form of vagrans. It is known only from the mountains of Arizona, but 

 is likely to be found in those of northern Mexico also. 



Specimens examined. — Total number, 9, from the following localities 

 in Arizona: San Francisco Mountain (type locality), 4; Springerville, 

 1 ; Ohiricahua Mountains, 4. 



SOREX AMCENUS sp. nov. 



Ti/jje from Mammoth Pass, head of Owens River, east slope Sierra Nevada, Califor- 

 nia (altitude, about 10,000 feet). Type, No. 2?|||, ^ ad., U. S. Nat. Mus., Depart- 

 ment of Agriculture collection. Collected July 22, 1891, by E. W. Nelson. 

 Original number, 1129. 



General c/mr^c/ers.— Similar in general to S. vagrans, but larger; tail 

 shorter; color widely different: sooty instead of dull chestnut brown. 



