36 MARMOTA. 



Type locality. Willow Creek, 7 miles east of Corvallis, Montana. 

 Altitude, 4000 feet. 



Geogr. Distr. Northern Rocky Mountain region from Flathead 

 Lake, Montana, south to the Wahsatch Mountains, Utah, and east 

 to the Bighorn Mountains, Wyoming. 



Color. Nose white with a black bar near tip ; lips and chin white ; 

 top of head black, white intermixed; upper half of ' back and flanks 

 golden-yellow; lower back with central portion black, hairs, white- 

 tipped, remainder slightly darker than upper back; arms, hands and 

 underparts burnt-sienna; thighs golden-buff, feet darker; tail above 

 chestnut, beneath black margined with chestnut. Ex type in United 

 States National Museum. 



Measurements. Total length, 583; tail, 170; hind foot, 75. Skull: 

 Occipito-nasal length, 79.3; Hensel, 78.8; zygomatic width, 53.2; 

 length of nasals, 33; length of upper molar series, 20; length of man- 

 dible, 58.2; length of lower molar series, 13.4. Ex type in United 

 States National Museum. 



Marmota flaviventer luteola Howell. 



Marmota flaviventer luteola Howell, Proc. Biol. Soc. Wash., XXVII, 

 1914, p. 15. 



Type locality. Woods P. O., in Medicine Bow Mountains, Wyo- 

 ming. Altitude, about 7000 feet. 



Geogr. Distr. Mountains of northern Colorado, and southeastern 

 Wyoming, from the Laramie Mountains south to Park County, Colo- 

 rado. 



Genl. Char. Similar to M. dacota and M. f. nosophora but paler, 

 less deeply ochraceous above; skull with longer ro'strum and smaller 

 audital bullae. 



Color. Head like M . f. nosophora; upper part of back light buff, 

 all hairs tipped with white; lower back much darker, more like under- 

 parts, and the white much less conspicuous; chin and upper part of 

 throat yellowish white; rest of underparts ochraceous-tawny, palest 

 near tail; limbs, hands and feet similar to those of M. f. nosophora, but 

 fingers and toes mixed black and buff; tail above reddish on basal 

 half, remainder much paler, almost ochraceous; beneath black edged 

 with tawny. Ex type in United States National Museum. 



Measurements. Total length, 650; tail, 182; hind foot, 90. 

 Skull: Occipito-nasal length, 87.5; Hensel, 75.5; zygomatic width, 

 50.4; intertemporal width, 15.9; length of nasals, 35.1; length of 

 upper molar series, 21 ; length of mandible, 56.9; length of lower molar 

 series, 20. Ex type in United States National Museum. 



