204 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



24. Neotoma intermedia. 



Neotoma intermedia. Rhodes' Am. Nat., 1894, Jany. , p. 69. 



Five specimens from San Antonio, San Bernardino Co. This 

 is quite a small and frequently light colored rat when compared 

 with any of the fuscipes group. It is a southern form, the type 

 having been described from San Diego Co. 



SUBFAMILY ARVICOLINCE. 



25. Phenacomys orophilus. 



Phenacomys orophilus. Merr. N. Am. Fauna, No. 5, 1891, 

 p. 65. 



A single specimen from Pyramid Peak, Eldorado Co., having 

 been compared with Dr. Merriam's specimens of M. orophilus 

 would seem to be the same as that species. Pyramid Peak has 

 an elevation of about 10,000 feet, and the present example was 

 obtained at a height of about 7,500 feet. It is the first instance, 

 I believe, of the species having been recorded from California, 

 although it has been taken in several localities in Oregon and 

 other northwestern states. 



26. Microtus edax. 



Microtus edax. Leconte, Proc. Acad. Nat. Scien., Phila. , vol. 

 vi, 1853, P- 45- 



Forty-six specimens from the following localities : 24, Alum 

 Rock Park, Santa Clara Co. ; 34, Portola, San Mateo Co.; 4, Car- 

 mel River, Monterey Co.; 4, Mt. Hamilton, Santa Clara Co.; 2, 

 San Antonio, San Bernardino Co.; i, Snow Mountains, Calusa 

 Co.; i, Big Trees, Calaveras Co. 



This series consists of both adults and young, but while there 

 is considerable variation in the skulls of adults, this seems to be 

 purely an individual difference, although in some instances it 

 extends even to the size of the teeth. They however all appear 

 to represent this well-known species, which has a pretty extended 

 distribution in the State of California. 



27. Microtus mordax. 



Arvicola (Mynomes) mordax. Merr. N. Am. Fauna, No. 5, 

 1891, p. 61. 



Seventy-seven specimens, as follows : 48, Silver Lake Amidor 

 Co.; 3. Blue Lake, Alpine Co.; 5, Pyramid Peak, Eldorado Co. ; 



