13. Ear from notch, dry more than 130 (137 fresh), _Lepus alleni_, p. 188 13´. Ear from notch, dry less than 130 (137 fresh). 14. Nape more or less black. 15. Ears yellow; range Pacific Coastal region of Isthmus of Tehuantepec in southern Oaxaca and Chiapas. _Lepus flavigularis_, p. 188 15´. Ears dark buff, grayish, white and black; range north of Isthmus of Tehuantepec. _Lepus callotis_, p. 186 14´. Nape gray or grayish buff. _Lepus gaillardi_, p. 188 [Illustration: FIG. 44. Distribution of _Lepus americanus_. Guide to subspecies: 1. _L. a. dalli_ 2. _L. a. macfarlani_ 3. _L. a. americanus_ 4. _L. a. pallidus_ 5. _L. a. columbiensis_ 6. _L. a. cascadensis_ 7. _L. a. washingtoni_ 8. _L. a. klamathensis_ 9. _L. a. tahoensis_ 10. _L. a. pineus_ 11. _L. a. oregonus_ 12. _L. a. bairdii_ 13. _L. a. seclusus_ 14. _L. a. phaenotus_ 15. _L. a. struthopus_ 16. _L. a. virginianus_ ] =Lepus americanus= American Varying Hare Total length, 363-520; tail, 25-55; hind foot, 112-150; ear from notch (dry), 62-70. Upper parts brownish or dusky grayish; hind feet brownish or white depending on subspecies; winter pelage white except in certain populations along Pacific Coast; basilar length less than 67; first upper incisors inscribing an arc of a circle the radius of which is less than 9.6 mm. There are two to six young in a litter according to Orr (1940:59). LEPUS AMERICANUS AMERICANUS Erxleben. 1777. [_Lepus_] _americanus_ Erxleben, Systema Regni Animalis ..., 1:330, type locality Hudson Bay, Canada. 1778. _Lepus hudsonius_ Pallas, Glires, p. 30, type locality not stated. 1790. _Lepus nanus_ Schreber, Säugethiere, 4:880-885, pl. 234B, a composite of _Lepus americanus_ and _Sylvilagus floridanus_. No type or type locality designated. Range given as from Hudson Bay to Florida. 1899. _Lepus bishopi_ J. A. Allen, Bull. Amer. Mus. Nat. Hist., 12:11, March 4, type from Mill Lake, Turtle Mts., North Dakota (inseparable from _L. a. americanus_ according to V. Bailey, N. Amer. Fauna, 49:138, January 8, 1927 [not December, 1926]).