FIELD BOOK OF MAMMALS 



Short-eared Grasshopper Mouse. — Onychomys leucogaster bre- 

 viauritus Hollister. 

 Resembling longipes but darker, tail shorter, hind foot 

 smaller, and ear smaller. Upperparts (winter) rich blackish 

 brown; sides lighter; hips and rump almost pure pinkish 

 cinnamon ; gray on nose, cinnamon spots at base of whiskers, 

 cinnamon-buff ear tufts; grayish brown on upperside of tail, 

 white on tip and underside; underparts white. Summer 

 pelage grayish brown above, no conspicuous ear tufts. 

 Total length, 6.2 inches; tail vertebra?, 1.7 inches; hind foot, 

 .88 inch; ear from notch (dry skin), .52 inch. Found in 

 "Eastern Nebraska, eastern and south-central Kansas, and 

 middle Oklahoma. From Neligh, Nebraska, and Fort 

 Riley and Neosha Falls, Kansas, west and south to Kinsley, 

 Kansas, and to Woodward and Fort Reno, Oklahoma. 

 Entirely within the Carolinian and Austroriparian faunas of 

 the Austral region." (Hollister) 



Torridus Group 



Differentiated from the leucogaster group by smaller size, 

 lighter build, and proportionally longer tail. 



Coues Grasshopper Mouse. — Onychomys torridus torridus 



(Coues). 

 Medium in size, rich reddish brown in color. Upperparts 

 from dark pinkish cinnamon, rich and glossy, to wood-brown 

 with little red; darkest on back where it is washed with 

 blackish brown; palest on nose and cheeks; conspicuous 

 white ear tufts ; ear dark brownish on outer side, edged with 

 whitish; tail above, grayish brown, tip and underside white; 

 underparts pure white; sharp contrast between under and 

 upperparts. Ear tufts inconspicuous or wanting in summer 

 and fall pelages. Total length, 5.8 inches; tail vertebras, 

 2.1 inches; hind foot, .86 inch; ear from notch (dry skin), 

 .56 inch. Found "from the Pecos Valley in Texas and south- 

 eastern New IVIexico, west across southern New Mexico and 

 Chihuahua into southeastern Arizona and northern Sonora. 

 North in the Rio Grande Valley to Socorro, New Mexico; 

 south to northern Durango." (Hollister) 

 Pallid Grasshopper Mouse. — Onychomys torridus perpallidus 

 Mearns. 

 Slightly larger than typical torridus and paler in color; ears 

 larger. Upperparts light pinkish cinnamon to vinaceous 

 buff; finely sprinkled with dark hairs on back; ear tufts not- 

 differing much from color of head ; pelage of upperparts slate- 

 gray at base. "Tail, feet, and underparts as in torridus, but 

 the underfur below very narrowly pale slate, very different 

 from the broadly grayish-black underfur of torridus.'^ (Hol- 

 lister) Total length, 6.3 inches; tail vertebrae, 2.3 inches; 

 hind foot, .88 inch; ear from notch (dry skin), .63 inch. 



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