Ill 11' 



MONOGRAPHS OF NORTH AMERICAN RODENTIA. 



'I'm-.i i CXXIX. — Lis! of tpednu n» i tamined of C\ nomys ludoviciancs— Continued. 



CYNOMYS COLUMBIANUS (Onl) Allen. 



Western Barking Squirrel; Western "Prairie Dog". 



Arctomyn columbianus "Ord, Guthrie's Geog. 2d Am. ed. ii, 1815, 292, 302" (= "Burrowing Squirrel", 



Lewis aod Clarke). — Allen, r'roc. Best. Soc. Nat. Hist, xvi, 1874, 294; Bull. Essex Inst, vi, 



1874, 57, 66 (Colorado). — Coues & Yarrow, Wheeler's Expl. and Surv. W. of 100th Merid. 



v, Zo.il. 1875, 122 (Middle Utah). 

 Anisonyx brachiura Rafinesque, Am. Month. Mag. ii, 1817, 45 (= "Burrowing Squirrel", Lewis and 



Clarke).— Desmarest, Mam. 1822, :!29 (from Rafiuesque). 

 Arctomys brachyurua Harlan, Fauna Araer. 1825,304 (= "Burrowing Squirrel", Lewis and Clarke). — 



FISCHER, Synop. Mam. 1829, 345 (from Harlan). — Richardson, Zoiil. Beecliey's Voy. 1839, 7 



(from the same). — Wagner, Suppl. Schreber's Siiuget. iii, 1843, 261 (from the same). — 



Schinz, Syn. Mam. ii, 1845, 02 (from the same). 

 Arclomys lewisi Audubon & Bachman, Quad. N. Am. iii, 1853, 32, pi. cvii (from specimen in Mus. Zoiil. 



Soc. Loud, from "Columbia River"). See also Baird, Mam. N. Amer. 1857, 347. 

 Cynomys gunnisoni BaIKD, Proc. Acad. Nat. Sci. Phila. 1855, 334; Mam. N. Amer. 1857, 335, pi, iv, fig. 2, 



animal ; pi. xlvii, tig. 4, skull. — Coues, Amer. Nat. i, 18ti7, 362; Proc. Acad. Nat. Sci. Phila. 



1867, 135 (Arzona). — Stevenson, Hayden's Rep. U. S. Geol. Surv. Wyom. 1871, 462. 

 Burrowing Squirrel, Lewis & Clarke, Travels, 1st Am. ed. ii, 1815, 173. 

 Lewis's Marmot, Audubon a. Bachman, 1. c. 

 Short-taikd Prairie Dog, Baird, Mam. N. Amer. 1857, 335. 



Specific chahs. — Length to base of tail about 10.25, ranging from 9.50 

 to 11.50; of tail to end of vertebra' about 2.00 (1.70 to 2.25); to end of 

 hairs 2. DO to 2.50. Above, dark yellowish-brown, sometimes inclining to red- 

 dish, varied with black; beneath, yellowish-white, varying to pale yellowish- 

 brown. Tail very short, flattened, generally wholly pure white (sometimes 

 yellowish-white) for the terminal half, the basal portion being above like the 



