480 BULLETIN" 128, UNITED STATES NATIONAL MUSEUM. 



t*Sylvilagus aquaticus littoralis Nelson. 



1909. Sylvilagus aquaticus littoralis Nelson, Nortli Amer. Fauna, 

 No. 29, p. 273. August 31, 1909. 



Type Locality. — Houma, Terrebonne Parish, Louisiana. 



Range. — A narrow belt of swamps and marshes along the GuK 

 coast, nearly if not entirely within upper limits of tidewater, 

 from Bay St. Louis, Mississippi, west through Louisiana to 

 Matagorda Bay, Texas. Vertical range below 50 feet altitude, 

 wholly within the lower austral zone. 



Genus BRA.CHYLAGUS Miller. 



1900. Brachylagus Miller, Proc. Biol. Soc. Washington, vol.13, 

 p. 157. June 13, 1900. Type, Lepus idahoensis Merriam. 



t*Brachylagus idahoensis (Merriam). 



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

 p. 76. July 30, 1891. 



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

 p. 323. 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. Washington, vol. 

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

 Merriam = Lepus diazi Diaz. 



*Romerolagus diazi (Diaz). (Volcano-rabbit.) 



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

 Mex. Expos, Internac. Colmnb. Chicago, pi. 42. March, 1893. 

 tl896. 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. — Middle slopes of Popocatepetl and Iztaccihuatl, mainly 

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

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



