_Marginal records._--Colorado (Nelson, 1909:210): Arkins; Golden; Greenhorn Mts. New Mexico: Sierra Grande (Nelson, 1909:211); Willis (_ibid._); Zuni Mts. (V. Bailey, 1932:60). Arizona: type locality. Utah (Durrant, MS): 4½ mi. NW Bluff; Block Canyon, 19 mi. SE Moab, 5400 ft.; _5 mi. NE La Sal P. O., 8000 ft._ =Sylvilagus audubonii= Audubon Cottontail Total length, 350-420; tail, 45-75; hind foot, 75-100; ear from notch (dry), 55-70; weight of _S. a. vallicola_, 7 ♂ 912 (835-988), 2 ♀ 1096, 1191 grams. Long hind legs, long ears, sparseness of hair on the ears, shortness of hair on the feet, prominent (upturned) supraorbital process of the skull and much inflated tympanic bullae are characters of this wide-spread species. Embryos in 19 Californian females averaged 3.6 (2-6) per female. [Illustration: FIG. 41. Distribution of _Sylvilagus audubonii_. 1. _S. a. audubonii_ 2. _S. a. vallicola_ 3. _S. a. sanctidiegi_ 4. _S. a. confinis_ 5. _S. a. arizonae_ 6. _S. a. warreni_ 7. _S. a. baileyi_ 8. _S. a. cedrophilus_ 9. _S. a. neomexicanus_ 10. _S. a. minor_ 11. _S. a. goldmani_ 12. _S. a. parvulus_ ] SYLVILAGUS AUDUBONII ARIZONAE (J. A. Allen). 1877. [_Lepus sylvaticus_] var. _arizonae_ J. A. Allen, Monogr. North Amer. Rodentia, p. 332, August, type from Beals Spring, Yavapai Co., Arizona. 1909. _Sylvilagus auduboni arizonae_, Nelson, N. Amer. Fauna, 29:222, August 31. 1896. _Lepus arizonae major_ Mearns, Proc. U. S. Nat. Mus., 18:557, June 24, type from Calabasas, Pima County, Arizona. 1904. _Lepus laticinctus_ Elliot, Field Columb. Mus., publ. 87, zool. ser., 3:254, January 7, type from Oro Grande, Mohave Desert, San Bernardino County, California. 1904. _Lepus l[aticinctus]. rufipes_ Elliot, Field Columb. Mus., publ. 87, zool. ser., 3:254, January 7, type from Furnace Cr., Inyo Co., California. _Marginal records._--Utah (Durrant, MS): 2 mi. SW Fish Springs; Holden; 7 mi. SW Tropic. Arizona (Nelson, 1909:225): Seligman; Ft. Verde; Dos Cabesos. Sonora (Burt, 1938:69): Tecoripa; La Libertad Ranch. Baja California: San Matias Pass (Nelson, 1909:225). California: Vallecito (Orr, 1940:126); Fairmont, Antelope Valley (_ibid._); Little Lake, 3300 ft. (Orr, 1940:125); 5300-5639 ft., near Benton (_ibid._). Nevada (Hall, 1946:614): Arlemont; 4 mi. E Smith Creek Cave. SYLVILAGUS AUDUBONII AUDUBONII (Baird). 1858. _Lepus audubonii_ Baird, Mamm. N. Amer., p. 608, July 14, type from San Francisco, San Francisco County, California. 1909. _Sylvilagus auduboni_, Nelson, N. Amer. Fauna, 29:214, August 31.