176 GLIRES. 
on a much richer material than had been available to any previous writer. Following 
his arrangement, the six Central-American species may be thus characterized :-— 
1. L. sylvaticus. Above pale yellowish brown, varied with black, and tinged with 
rufous; beneath white. Length about 14", of ear 2'-50, of tail 1°75. 
. L. graysoni. Above pale rufous, varied with blackish brown ; beneath white ; 
tail short, blackish brown above, white below. Length about 14-50, of ear 
2"-30, of tail 1”. 
3. L. gabbi. Above cinnamon-brown, strongly varied with black; beneath white ; 
ears very short ; tail rudimentary, covered with yellowish-brown hairs. Length 
about 14", of ear 1°50. 
4, L. callotis. Above pale yellowish brown, mixed with black; beneath greyish 
white; ears longer than the head, sometimes tipped with black; tail black 
above (which colour extends into a patch on the rump), grey below. Length 
about 20", of ear 5”, of tail 2:25. 
. L. palustris. Above rufous, strongly shaded with black; beneath greyish 
white ; tail short, rufous, varied with black above, greyish white below; ears 
broad and rounded ; feet sparsely furred. Length about 16”, of ear 2'"50, of 
tail 0°80. 
. L. aquaticus. Above yellowish brown, finely shaded with black; beneath pure 
white; tail moderate, dark brown or dusky above, pure white below; ears and 
feet as in last species. Length about 19”, of ear 2""75, of tail 1-90. 
bo 
Cnr 
or) 
The last two species agree, not only in their scantily-haired feet and semiaquatic 
habits, but in the comparative stoutness of their skulls and incisor teeth, and in having 
the postorbital process completely ankylosed with the cranium. ‘They were generically 
separated by the late Dr. Gray, under the name of Hydrolagus*. 
1. Lepus sylvaticus. 
? Lepus nanus, Schreber, Sdugth. 4ter Th. p. 881, pl. cexxxiv. B. (1792, in part)’. 
Lepus sylvaticus, Bachman, J. Ac. Philad. vii. p. 403 (1837, descr. orig.)*; Baird, Mamm.N. Am. 
p. 597°; Dugés, La Nat.i. p. 138*; Allen, Mon. N.-Am. Rodent. p. 827’. 
Conejo of Mexicans (common to the other species). 
Hab. Norta America, south of 45° N. lat.°—Mexico, Guanajuato (Dugés*), Tehuan- 
tepec (Sumichrast, U.S. Nat. Mus.°), Orizaba (Lotteri, ib.°), Mirador (Sartorius, 7b.°), 
Merida (Schott, 70.°) 
This is the well-known “ Grey Rabbit” or Wood-Hare of the United States, where it 
* Ann, & Mag. Nat. Hist. 3rd ser. xx. p. 221. 
