MILLER AND REHN: NORTH AMERICAN MAMMALS. 65 
Family MURIDAE. 
Subfamily Murinae. 
Genus MUS Linn aeus. 
1758. Mus Linnaeus, Syst. nat., x ed., i, p. 59. Name at 
present restricted to genus including the species musciihis and 
rattus. 
Mus alexandrinus Geoffroy. 
1818. 3fus alexandrinus Geoffroy, Description de I’Egypte, 
mammif^res, p. 733. 
Regarded by Yerbury and Thomas (Proc. zool. soc. London, 
1895, p. 553) as a form of Mus rattus. 
Type locality. — Alexandria, Egypt. 
Mus musculus Linnaeus. 
1758. [^Mus'] niusGidus Linnaeus, Syst. nat., x ed., i, p. 62. 
Type locality. — Sweden. 
Mus musculus jalapae Allen and Chapman. 
1897. Mus musculus jalapae Allen and Chapman, Bull. 
Amer. mus. nat. hist., ix, p. 198. June 16, 1897. 
Type locality. — Jalapa, State of Vera Cruz, Mexico. 
Mus norvegicus Erxleben. 
1777. \_3Ius'\ norregicus Erxleben, Syst. regni anim., i, p. 
381. 
Type locality. — Norway. 
Usually known as Mus decumanus (Pallas’ nov. sp. quadr. glir. 
ord., p. 91, 1778). For change see Rehn, Proc. biol. soc. Wash¬ 
ington, XIII, p. 167, October 31, 1900. 
Mus rattus Linnaeus. 
1758. \^3Ius'\ rattus Linnaeus, Syst. nat., x ed., i, p. 61. 
Type localital — Sweden. 
