NORTH AMERICAN LAND MAMMALS. 363 



Sylvilagus fioridanus chiapensis (untinucd. 



Range. — Interior of Chiapas, maiiily iu the higlilands, tiic 

 adjacent highlands of Guatemala and southerly to middle 

 northern Nicaragua. Vertical range from about 2,000 to over 

 10,000 feet altitude in Chiapas and Guatemala; zonal range 

 niauily upper Sonoran and transition, but ranges down to 

 upper border of tropical zone. 



t*Sylvilagus fioridanus yucatanicus (Miller). 



1899. Lepus fioridanus yucatanicus Miller, Proc. Acad. Nat. 

 Sci. Philadelphia, p. 384. October 5, 1899. 



1904. Sylvilagus fioridanus yucatanicus Lyon, Smiths. Misc. 

 Coll., vol. 45, p. 336. June 15, 1904. 



Type Locality. — Merida, Yucatan. 



Range. — Coastal plain of Yucatan, Campeche, and Tabasco. 



Vertical range from sea level to about 500 feet in Campeche. 



Zonal range arid and semiarid tropical zones. 



t*Sylvilagus cognatus Nelson. 



1907. Sylvilagus cognatus Nelson, Proc. Biol. Soc. Washington, 

 vol. 20, p. 82. July 22, 1907. 



Type Locality. — Near summit of the Manzano Mountains, 

 Valencia County, New Mexico. 



Range. — High mountain summits and adjacent slopes of central- 

 eastern New Mexico. Vertical range from about 0,500 to 

 10,200 feet altitude on Manzano Mountains; zonal range mainly 

 transition, and lower part of Canadian zone. 



■j* Sylvilagus robustus (Bailey). 



1905. Lepus pine^is rohustus Bailey, North Amer. Fauna, No. 

 25, p. 159. October 24, 1905. 



1909. Sylvilagus rohustus Nelson, North Amer. Fauna, No. 29, 



p. 194. August 31, 1909. 

 Type Locality. — Six thousand feet altitude in Davis Mountauis, 



Jeff Davis County, Texas. 

 Range. — Davis, Chinati, and Chisos Mountains in southwestern 



Texas. Vertical range mainly above G,000 feet in Davis 



Mountains; zonal range mainly transition. 



*Sylvilagus transitionalis (Bangs). 



1895. Lepus sylvaticus transitionalis Bangs, Proc. Boston Soc. 

 Nat. Hist., vol. 26, p. 405. January 31, 1895. 



1909. Sylvilagus transitionalis Nelson, North Amer. Fauna, 

 No. 29, p. 195. August 31, 1909. 



Type Locality. — Liberty Hill, New London County, Con- 

 necticut. 



