LEPUS. 431 



E. Macrotolagus. 



Interparietal obliterated in adults; skull twice as long as wide; 

 postorbital processes large, arching, and united to cranium by a 

 suture, and inclosing a wide and long foramen; nasals lengthened; 

 upper front incisors without distinct lateral groove; ear longer than 

 hind foot. 



KEY TO THE SPECIES AND SUBSPECIES. 

 A. Ears very large, longer than hind foot. 



a. Ears black at base. 



a.' Nape of neck black. PAGE 



a/' Above yellowish brown and black L. callotis 43 1 



b." Above grayish fawn and black L. merriami 432 



b.' Nape ochraceous buff L. gaillardi 433 



c.' Nape paler buff L. g. batlyi 433 



d.' Nape fulvous L. alleni 433 



e/ Nape plumbeous L. a. palitans 434 



b. Ears without black at base, fringed with 

 white or yellowish white. 



a.' Ears broccoli brown; nape grizzled black 



and white L. asellus 435 



b/ Ears grizzled black and brown; nape pale 



yellowish brown L. t. eremicus 435 



c.' Ears brownish gray; nape grayish white. 



a." Hind foot, 1 18 mm L. t. griseus 436 



b." Hind foot, 114 mm L. t. micropus 436 



d/ Ears pale drab; nape pale yellowish 



brown L. t. deserticola 437 



e/ Ears dark brown; nape smoky gray; size 



large; hind foot, 161 mm L. calif ornicus 437 



f.' Paler and smaller; hind foot, 120 mm L. c. xanti 438 



g/ Ears gray. 



a." Upper parts black; beneath pale vina- 



ceous cinnamon L. insularis 438 



b." Upper parts steel gray and black; be- 

 neath whitish, washed with salmon. . . .L. martirensis 439 



447. callotis (Lepus), Wagl., Nat. Syst. Amph., 1830, p. 23. Elliot, 

 Syn. N. Am. Mamm., 1901, p. 288. 



nigricaudatus , Bennett, Proc. Zool. Soc., 1833, p. 41. 



mexicanus (Licht.) Richards 6th Rep. Brit. Assoc., 1837, p. 150. 



flavigularis, Wagl. Suppl. Schreib. Saugeth. iv, 1844, p. 107. 

 BEAUTIFUL-EARED JACK RABBIT. Liebre in Mexico. 



Type locality. "Mexico." 



