KRACHYLAGUS ROMEKOLAOUS — OOHOTOXA. 39 



.""Specimen rereutly made over inti) a inodern .study skin, \vell-i)reserved; skull 

 quite c'ouiplete, the tynipanic, mastoid, and exocei])ital bones of the rijjht side 

 broken away, and the an^le of the riirlit lialf of tin- mandible broken. 



Genus BRACH YLAGUS. 



Lepus idahoensis Merriani. Biological Survey collection. 



North Ainer. Fauna, Xo. 5, pp. 75-78, 2 tigs., .July 30, 1891. 

 =Brachylagus idahoensis (Merriam). See Lyon, Smithsonian Miscell. Coll., 

 XL^^ No. 1456, p. 837, June 15, 1904. 



Iflei* Skin and skull. Adult male. Palisimeroi Valley, Custer 

 County, Idaho. September 10, 18!H). Collected by V. Bailey and 

 Dr. B. H. Dutc-her, U. S. A. Original number isic. 



Well-iua<le skin in good condition; skull perfect, except for a perforation in 

 each audital bulla. 



Genus ROMEROLAGUS. 



Romerolagus nelsoni Merriam. Biolooical Survey collection. 



Proc. Biol. Soc. Wash., X, pp. 173-174, tig. 33, Dec. 29, lS9t). 



57949. Skin and skull. Adult male, Moupt Popocatepetl, Mexico. 

 January 6, 1894. Collected by E. W. Nelson and E. A. Goldman. 



Well-made skin in good condition; skull perfect, except for absence of last l(>ft 

 upper molar; angle of left mandibular ramus broken. 



Family OCHOTONlDyE. 



Genus OCHOTONA. 



Ochotona cansus Lyon. 



Smithsonian Miscell. Coll., L, No. 1726, p. 1.36, pi. 15, figs. 1-3, July 9, 1907. 



144030. Skin and skull. Adult male. Taocheo, Province of Kansu, 

 China. June 8, 1906. Collected b}^ W. W. Simpson. Orioinal 

 number 13. Catalogued March 6, 1907. 

 Well-made skin in good condition; skull perfect. 



Lagomys coUaris Nelson. 



Proc. Biol. Soc. Wash., Vlll, j). 117, December 21, 1893. 

 =Ochotona collaris (Nelson). See Trouessart, Catalogus Manimalium, p. 648, 1897. 



ilalt- Skin and skull. Adult. Near the head of the Tanana Kiv^er, 

 about 200 miles south of Fort Yukon, Alaska. Sunnner of ISSO. 

 Collected by E. W.Nelson. Ori<^inal number 164. Skin catalogued 

 June 11, 1884; skull, November 2, 1893. 



Skin fairly well preserved, Init badly made up; no wire in legs. Posterior and 

 y>a8al portions of the left half of the cranium and most of the ascending ramus 

 of the left half of the mandible lacking; otherwise skull complete. 



