242 University of California Fuhlications in Zoology [Vol. 21 



Marmota flaviventris fortirostris, new subspecies 



White Mountains Marmot 



Type. — Female, adult, skin and skull ; no. 27539, Mus. Vert. Zool. ; 

 McAfee Meadow, 11,800 feet altitude, White Mountains, Mono County, 

 California; August 10, 1917; collected by A. C. Shelton; original 

 no. 3533. 



Diagnods. — A Marmota of the "flaviventris group" (see Howell, 

 1915, pp. 19, 36-56). Size decidedly smaller than M. flaviventris 

 sierrae Howell of the Sierra Nevada directly to the southwest across 

 Owens Valley, but larger than M. f. parvula Howell of certain ranges 



TABLE II. 



Measurements, in millimeters, of fourteen adult and subadult specimens of 



Marmota flaviventris fortirOsiris collected by A. C. Shelton, H. G. White, 



and J. Grinnell in the White Mountains, Mono County, California, 



July 24 to August 10, 1917 £ 



Average of 10 $$ 518 155 68 16 74.9 30.3 49.6 36.4 17.0 17.2 18.4 



of mountains to the northeastward in Nevada ; general coloration aver- 

 aging paler than in sierrae, especially on lower surface where ochra- 

 ceous-tawny instead of cinnamon-brown ; skull with rostrum relatively 

 shorter and broader than in either sierrae or parvula, nasals much 

 shorter than in sierrae, nasals and premaxillary tongues wider than in 

 parvula. (See figs. 4-6.) 



Measurements. — See Table II; comparisons should be made with 

 the figures given by Howell (1915, pp. 55-56). 



