UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 12, No. 5, pp. 295-296 April 15, 1914 



APLODONTIA CHRYSEOLA, A NEW MOUNTAIN 



BEAA 7 ER FROM THE TRINITY REGION 



OF NORTHERN CALIFORNIA 



BY 



LOUISE KELLOGG 

 (Contribution from the Museum of Vertebrate Zoology of the University of California) 



Discovery of the well-marked new form of mountain beaver here 

 described was one of the results of field work carried on in the Trinity 

 region of northern California by Miss Annie M. Alexander and the 

 writer during the summer of 1911. 



Aplodontia chryseola, new species 

 Trinity Mountain Beaver 



Type: Male adult, no. 13328, Mus. Vert. Zool.; Jackson Lake, 

 Siskiyou County, California, altitude 5900 feet; June 22, 1911; col- 

 lected by A. M. Alexander; original number 1441. 



Specific Characters: Coloration, both above and below, varying 

 about ochraceous-buff or buffy golden; rostrum short as compared 

 with that of Aplodontia californica (Peters) ; auditory tubes long in 

 proportion to size of skull. 



Material : The basis for this diagnosis consists of nine specimens, 

 nos. 13324-13332, taken at the following localities, all in that portion 

 of the Trinity Mountain region known as the Salmon Mountains : 

 Jackson Lake ; South Fork of Salmon River ; Wildcat Creek ; head of 

 Grizzly Creek. 



Remarks: In size this new species of Aplodontia is nearest A. 

 californica (Peters) (= A. major Merriam), the form occupying the 



