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. 
KEYSO Tee sPECIES AND SUBSPEGIES. 
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: callotts 431 
b.’” Above grayish fawn and black........ L. merriamt 432 
be Nape Oebraceouagoull. 28).........00...: L. gallard: 433 
CeeNapewperer DUM... 02. -... voces. ous Lee. bativim ass 
Pee Nel Demy OUST... coud sd eae L, allent 433 
ey Napesmmimbeotsigun ta... :.... cade. -- L. a. palitans 434 
b. Ears without black at base, fringed with 
white or yellowish white. 
a.’ Ears broccoli brown; nape grizzled black 
Fit LO GR re Lo, -aSelits. 43's 
b.’ Ears grizzled black and brown; nape pale 
VeGumaisit) OLOWMAM tr... mee eee L. t. eremicus 435 
c.’ Ears brownish gray; nape grayish white. 
a,’ Sid foot, MimemmmiGnd. |... ea. Leen. L. t. griseus 436 
i. Mid TOOtQMmERN Iai. 6... oe... 2 L. t. micropus 436 
d.’ Ears pale drab; nape pale yellowish 
RON we. A Ltt deserticola 437 
e.’ Ears dark brown; nape smoky gray; size 
large imc) fomrmtememnim ..\3. yes... L. californicus 437 
m Palerand smater: bind -foot; r20mm..... 4, 6, some 438 
g.’ Ears gray. 
a.’ Upper parts black; beneath pale vina- 
COMMS CUMpmmMO Mi. . . 5. we sPleutue We ens 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. Zodl. 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 Rassit. Liebre in Mexico. 
Type locality. “Mexico.” 
