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Zapus princeps kootenayensis new subspecies 
Kootenay Jumping Mouse 
Type. Female adult, skin and skull, No. 10020, National Museum of 
Canada; near summit of Green mountain, head of Murphy creek, about 
10 miles north of Rossland, West Kootenay district, British Columbia, 
at about 6,000 feet altitude; latitude 49° 13' north, longitude 117° 52' west; 
July 18, 1929; collected by R. M. Anderson; original No. 24. Allotype: 
male adult, skin and skull, No. 9828, taken at base of Old Glory mountain, 
7,000 feet altitude, about 5 miles southwest of type locality, July 26, 1929, 
by H. M. Laing; original No. 1346. 
Geographic Distribution. Interior of southern British Columbia, from 
eastern summit of Cascade mountains, Similkameen, Okanagan, Kettle, 
Columbia, Kootenay, and Moyie River valleys as far east as Purcell range 
of Selkirks; found in more humid parts of the Transition and Canadian 
life zones. 
Diagnostic Characters. Similar in size to Z. princeps princeps of the 
Rocky Mountains region of western Alberta and eastern British Columbia, 
but with colours noticeably paler and duller in tone, and the general 
appearance dusty; lighter in colour than Z. p. oregonus , with median dorsal 
area less streaked with yellow hairs; averaging larger and more greyish in 
colour than Z. c. cinereus (of Utah), and Z. p. curtatus and Z. p. palatinus 
(of Nevada). 
Colour. Upper parts dull ochraceous, lightly sprinkled with blackish; 
dorsal band broad, mixed yellowish brown and black, in some cases fairly 
well marked, in others obscure; sides paler than back, due to fewer blackish 
tips to hairs; a distinct dull yellowish lateral line separating sides from 
pure white of under parts; tail distinctly bicolour, pale brownish above, 
dull whitish below; ears blackish brown with very narrow, indistinct pale 
edgings; feet white. 
External Measurements . Type: total length, 261 (mm.); tail verte- 
brae, 150; hind foot, 32-5. Allotype (male): total length, 235; tail verte- 
brae, 140; hind foot, 31. Average of nineteen adult males (including 
sixteen topo types): total length, 226*1 (235*0-207*0); tail vertebrae, 135*2 
(142*0-127*0); hind foot, 30*8 (33*0-28*0). Average of twenty adult 
females (including fifteen topotypes): total length, 245 (261*0-216*0); 
tail vertebrae, 140 • 5 (152*0-125*0); hind foot, 30*5 (33*0-29*0). Females 
considerably larger than males. 
Skull. The skull of Z. p. kootenayensis has the general characters of 
the Zapus princeps group. The shape of skull is essentially the same as in 
princeps from Colorado (type locality), Alberta, and eastern British 
Columbia, but with brain case and breadth of zygomatic arches noticeably 
narrower than in Z. p. oregonus. The incisive foramina in kootenayensis 
are narrower throughout than in oregonus, curved outwards, and not 
noticeably broadened posteriorly in most specimens, not showing the great 
posterior enlargement typical of oregonus. 
