Subspecies and Distribution. M.p.pennsylvanicusOrd,1815—extremeSEQuebecandNewBrunswick,Canada,andfromSouthDakota,N&ENebraska,andextremeNEKansasEtotheAtlanticcoastfromMaineStoSouthCarolina,USA. M.p.acadicusBangs,1897—PrinceEdwardIandNovaScotia,Canada. M.p.admiraltiaeHeller,1909—AdmiraltyI,Alaska,USA. M.p.alcorniBaker,1951—fromSWAlaska,USA,EtoSYukon,Canada. M.p.aphorodemusPreble,1902—SENunavutandNEManitoba,Canada. M.p.axtecusJ.A.Allen,1893—restrictedrangeinNWNewMexico,USA. M.p.chihuahuensisBradley&Cockrum,1968—knownonlyfromthevicinityofGaleana,NWChihuahua,Mexico. M.p.copelandiYoungman,1967—extremeSNewBrunswick,Canada. M.p.drummondiiAudubon&Bachman,1854—fromNAlaskaandNWYukonSEtoWOntario,Canada,andextremeWWashington,NIdaho,extremeNWMontana,NorthDakota,andextremeNSouthDakota,USA. M.p.enixusBangs,1896—C&NEQuebecandLabrador,Canada. M.p.finitusS.Anderson,1956—SWNebraska,extremeNEColorado,andextremeNWKansas,USA. M.p.fontigenusBangs,1896—WOntarioandSQuebec,Canada. M.p.funebrisDale,1940—SWBritishColumbia,Canada,andNEWashington,USA. M.p.insperatusJ.A.Allen,1894—SEAlbertaandSWSaskatchewan,Canada,N&EMontana,WNorthDakota,NEWyoming,andWSouthDakota,USA. M.p.kincaidiDalquest,1941—knownonlyfromMosesLake,CWashington,USA. M.p.labradoriusBailey,1898—NWQuebec,Canada. M.p.magdalenensisYoungman,1967—MagdalenIs,Quebec,Canada. M.p.microcephalusRhoads,1894—SEBritishColumbiatoSAlberta,Canada. M.p.modestusBaird,1858—fromCColoradoStoCNewMexico,USA. M.p.nigransRhoads,1897—EVirginiaandNENorthCarolina,USA. M.p.provectusBangs,1908—BlockI,RhodeIsland,USA. M.p.pullatusS.Anderson,1956—C&EIdaho,WMontana,WWyoming,andNCUtah,USA. M.p.rubidusDale,1940—SEAlaska,USA,andWBritishColumbia,Canada. M.p.shattuckiHowe,1901—IsleboroandNorthHavenIs,Maine,USA. M.p.tananaensisBaker,1951—CAlaska,USA. M.p.terraenovaeBangs,1894—Newfoundland,Canada. M. p. uligocola S. Anderson, 1956 — extreme SE Wyoming and NE Colorado, USA. in Cricetidae