414 LEPUS. 



KEY TO THE SUBGENERA. 



A. Tail rudimentary. 



a. Interparietal persistent as a distinct bone in 



adults, 

 a/ Ear shorter than hind foot. 



a." Skull and teeth strong, heavy; p<0stor- 



bital process of frontal ankylosed PAGE 



with cranium for its entire length Limnolagus 414 



b." Skull and teeth lighter; postorbital pro- 

 cess of frontal ankylosed with cra- 

 nium behind, inclosing a foreman Silvilagiis 416 



b/ Ear longer than hind foot Microlagus 428 



b. Interparietal always obliterated in adults. . . .Macrotolagus 431 



B. Tail none Tapeti 426 



A. Limnolagus. 



"Interparietal present as a distinct bone in adults. Skull and 

 teeth massive ; rostral portion of skull wide as high ; postorbital pro- 

 cess of frontals ankylosed with the cranium for its entire length; 

 frontals and parietals deeply pitted ; skull rather straight above, about 

 half as wide as long; pelage harsh; head small; ear, tail, and hind 

 foot short, the latter scantily haired." 



KEY TO THE SPECIES AND SUBSPECIES. 

 A. Skull large, heavy ; frontals and parietals deeply 

 pitted ; pelage harsh. 



a. Basisphenoid and basioccipital forming an 



obtuse angle. PAGE 



a.' Above pale buffy gray, lined with black. .L. a. attwateri 414 

 b/ Above yellowish brown, tinged with 



rufous and lined with black L. palustris 415 



b. Basisphenoid and basioccipital on same plane L. truii 415 



aquaticus attwateri (Lepus), Allen, Bull. Am. Mus. Nat. Hist., 1895, 



p. 327. Elliot, Syn. N. Am. Mamm., 1901, p. 278. 

 ATTWATER'S SWAMP HARE. 



Type locality. Medina River, 18 miles south of San Antonio, 

 Bexar County, Texas. 



Geogr. Distr. Yucatan, Mexico, to southeastern Texas. 



Genl. Char. The general color paler than that of L. aquaticus. 

 Size similar. 



Color. Above pale buffy gray lined with black ; sides whitish gray 

 tinged with buff; dorsal region tinged with yellowish, darkest on the 

 rump ; belly and inside of legs white ; back sometimes nearly all black ; 



