NORTH AMEEICAN LAND MAMMALS. 375 



Genus BRACHYLAGUS Miller. 



1902. Brachylagus Miller, Proc. Biol. Soc. Washington, vol. 13, 

 p. 157. June 13, 1902. Type, Lepus idahoensis Merriam. 



t*Brachylagus idahoensis (Merriam). 



1891. Lepus idahoensis Merriam, North Amer. Fauna, No. 5, 

 p. 76. July 30, 1891. 



1904. Brachylagus idahoensis Lyon, Smiths. Msc. Coll., vol. 45, 

 p. 337. June 15, 1904. 



Type Locality. — Pahsimeroi Valley, Custer County, Idaho. 



Range. — Sagebrush plains of southern Idaho, southeastern Ore- 

 gon, extreme northeastern California, and northern and central 

 Nevada. Vertical range from about 4,500 to over 7,000 feet 

 altitude in Nevada; zonal range, mainly upper Sonoran, but 

 extending into the lower border of transition zone. 



Genus ROMEROLAGUS Merriam. 



1896. Romerolagus Merriam, Proc. Biol. Soc. Wasliington, vol. 

 10, p. 173. December 29, 1896. Type, Romerolagus nelsoni 

 Merriam. = Lepus diazi Diaz. 



*Romerolagus diazi (Diaz). 



1893. Lepus diazi Diaz, Catal. Com. Geograf.-Expl. Repub. Mex. 

 Expos. Internac. Columb. Chicago, pi. 42. March, 1893. 

 +1896. Romerolagus nelsoni Merriam, Proc. Biol. Soc. Washing- 

 ton, vol. 10, p. 173. December 29, 1896. (West slope of 

 Mount Popocatepetl, State of -Mexico, Mexico. Altitude, 

 11,000 feet.) 



1911. Romerolagus diazi Miller, Proc. Biol. Soc. Washington, 

 vol. 24, p. 228. October 31, 1911. 



Type Locality. — Eastern slope of Mount Iztaccihuatl, Puebla, 

 Mexico. 



Range. — Mddle slopes of Popocatepetl and Iztaccihuatl, mainly 

 on north and west sides, fronting VaUey of Mexico. Vertical 

 range from about 10,000 to 12,000 feet; zonal range, Canadian. 



