52 



NORTH AMERICAN FAUNA. 



[No. 37. 



specimens being considerably redder than typical luteola; the skulls, 

 however, are typical. 



Specimens examined. — Total number, 42, as follows: 



Colorado: Boulder County (altitude 8,000-11,000 feet), 4;^ Coulter, 1; Elk- 

 head Mountains, 1; Estes Park, 1; Lake John, 1;^ Longs Peak, 1; Meeker, 

 2; 2 Middle Park, 1; Mount Lincohi, 6;^ North Park, 1;* Pikes Peak, 1;* 

 Sheephom Pass, 4;^ Steamboat Springs (18 miles below), 2;^ Sulphur 

 Springs, 5. ^ 



Wyoming: Laramie Mountains, 7; Riverside, 2; Sherman, 1; Woods P. O., 1. 

 MARMOTA FLAVIVENTRIS WARRENI Howell. 

 Warren's Marmot. 

 (PI. VI, fig. 4; PI. XII, fig. 2). 

 Marmota flaviventer warrenil3.ow ell, Proc. Biol. Soc. Washington, XXVII, 1914, p. 16. 

 T'upe locality. — Crested Butte, Colo. 



Distribution. — Western Colorado, from Garfield County south to 

 Saguache County; exact limits of range unknown. 



Characters. — Size large (equaling dacota) ; colors deep red with little 

 buff; skull similar to that of ohscura, larger than that of dacota or 

 luteola. 



Color. — General tone of upperparts hazel, the underfur at base 

 between mouse gray and fuscous, succeeded by pinkish cinnamon 

 or cinnamon; long hairs hazel sub terminally, tipped with a small 

 area of buffy white; top and sides of head dark chestnut or bay; 

 sides of neck cinnamon-buff; underparts hazel, varied with ochra- 

 ceous-tawny, becoming chestnut on lower abdomen and Sanford's 

 brown on throat; lips soiled whitish, bordered with cream-buff or 

 pinkish cinnamon; fore legs hazel, shading to auburn on feet; hind 

 feet and toes hazel, varied with cinnamon; tail dark chestnut-brown 

 at base, shading to hazel or tawny; under surface blackish chestnut- 

 brown. 



SJcull. — (Known only from females) : Larger than that of dacota 

 with longer, slenderer rostrum and narrower palatal foramina; 

 very similar to that of ohscura, but averaging longer and relatively 

 narrower. 



Measurements. — Adult female (type): Total length, 565 ; tail verte- 

 brae, 131; hind foot, 82. Skull:® Adult female: Condylo-basal 

 length, 83.3-89.3 (average 85.9) ; palatal length, 47-49.3 (47.9); post- 

 palatal length, 33.6-36.9 (35.5) length of nasals, 36.8-39.2 (38.1); 

 zygomatic breadth, 57-59 (57.7); breadth across mastoids, 42.9- 



1 Two in collection Field Mus. Nat. Hist. 



2 Collection E. R. Warren, Colorado Springs, Colo. 



3 Collection Mus. Comp. Zool. 



* Collection Colo. Mus. Nat. Hist. 



5 Three in collection E. R. Warren; one in collection Amer. Mus. Nat. Hist, 

 fi Three specimens from Crested Butte and Mud Springs, Colo. 



