Howell — Ten New Marmots from North America. 15 



smallest known form in the genus. It is known only from the Toyabe 

 and Toquima Ranges but probably occurs, also, in other desert ranges in 

 central Nevada. 



Marmota flaviventer nosophora* subsp. nov. 



GOLDEN-MANTLED MARMOT. 



Type from Willow Creek, 7 miles east of Corvallis, Montana (altitude 

 4000 feet). Adult female, No. 1(1S,494, U. S. National Museum (Biologi- 

 cal Survey Collection); April 8, 1910, A. H. Howell; original number, 

 172:1. 



Characters. — Similar to M. f. dacota, but slightly smaller; upperparts 

 less extensively reddish and more mixed with black, the underfur decid- 

 edly paler; fore part of back overlaid with a mantle of golden buff; skull 

 averaging smaller, with relatively slenderer rostrum and much smaller 

 palatal foramina. 



Measurements. — Adult female (type): Total length, 583; tail vertebrae, 

 170; hind foot, 75. Skull (type): Condylo-basal length, 79; zygomatic 

 breadth, 53.2; breadth of rostrum, 17. 



Remarks. — This race occupies the northern Rocky Mountain region, 

 from Flathead Lake, Montana, south to the Wahsatch Mountains, Utah, 

 and east to the Bighorn Mountains, "Wyoming. It intergrades with avara 

 at the northern end of its range, with dacota in Wyoming and probably 

 with engethardti and parvula in Utah and Nevada, respectively. 



Marmota flaviventer luteola subsp. nov. 



PARK MARMOT. 



Type from Woods P. 0. , in Medicine Bow Mountains, Wyoming (alti- 

 tude about 7500 feet). Adult male, No. 186,520, U. S. National Museum 

 (Merriam Collection, No. *fff); August 13, 1888, V. Bailey; original 

 number, 148. 



Characters. — Similar in color to dacota and nosophora, but paler and 

 less intensely ochraceous above and yellowish instead of deep red below. 

 Compared with engethardti: colors paler and more yellowish (less brown- 

 ish). Skull similar to that of nosophora, but averaging slightly longer and 

 narrower, with longer rostrum and smaller audital bullae. 



Measurements. — Sub-adult male (type): Total length, 650; tail verte- 

 brae, 182; hind foot, 90. Skull (old male from Mt. Lincoln, Colorado) : 

 Condylo-basal length, 92.5; zygomatic breadth, 59.4; breadth of ros- 

 trum, 20.8. 



Remarks. — This subspecies occupies the mountains of northern Colo- 

 rado and southeastern Wyoming (from the Laramie Mountains south to 

 Park County, Colorado), intergrading with dacota on the north and with 

 warreni on the south. 



* In allusion to the fact that the animal aids in the spread of Rocky Mountain 

 spotted fever, through serving as a host for the fever ticks. 



