10'. Geographic range west of Mackenzie River
_Lepus othus_, p. 177

9'. Geographic range south of a line from Port Simpson,
British Columbia, to Halifax, Nova Scotia
_Lepus townsendii_, p. 180

1'. South of 34[deg] N latitude.

11. In state of Tamaulipas, M['e]xico.
_Lepus californicus_, p. 181

11'. Range outside Tamaulipas, M['e]xico.

12. Ears with terminal black patch (on outside).
_Lepus californicus_ and _Lepus insularis_,
pp. 181, 186

12'. Ears without terminal black patch.

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 Ha