1910] Taylor—Two New Rodents from Nevada. 287 
EXTERNAL MEASUREMENTS OF Callospermophilus trepidus.3 
All from Pine Forest Mountains, Humboldt County, Nevada. 
Ratios 
Sex Tail Vert. Hind Foot. 
Museum and Total Tail Hind to to 
Number Age Length Vertebrae Foot Total Length Total Length 
8258 pase! We cee eae AD eet eee 
a 8244 gad 288 104 40 36.1 13.9 
8231 dad 266 99 42 37.2 15.8 
$240 dad 268 90 44 33.6 16.4 tf 
8243 Gad. 255 95 39 37.2 15:3 
$246 Gad. 268 99 40 36.9 14.9 
8227 Gad. 283 107 40 37.8 14.1 
8232 Pad. 252 101 40 40.1 15.9 
8241 Pad. 280 105 40 37.5 14.3 
8249 KEG ay 5 pes Se eee eee AQ) cee ie eee 
Averages of dd 274.0 97.6 42.0 35. 15.3 
Averages of 9° 267.6 101.4 39.8 37. 14.9 
270.0 100.0 40.7 37.0 15.0 
Averages of all adults 
EXTERNAL MEASUREMENTS OF Callospermophilus chrysodeirus chrysodeirus. 
Museum 
Number 
3298 
3305 
301 
3302 
3299 
303 
3307 
3300 
3304 
3306 
All from Mount Shasta, Siskiyou County, California. 
Sex 
and 
Age 
dad. 
Jad. 
dad. 
oad. 
dad. 
Pad. 
Cad. 
Pad. 
ad. 
Gad. 
Averages of gd 
Averages of 22 
Averages of all adults 
Total Tail Hind 
Length Vertebrae Foot 
BO Geese 40 
266 91 42 
265 90 38 
260 88 41 
264 89 42 
256 §2 42 
254 82 42 
265 82 44 
265 80 42 
260 82 42 
258 89.5 40.6 
260 81.6 42.4 
259 85.1 41.5 
Ratios 
Tail Vert. Hind Foot. 
to to 
Total Length Total Length 
see 17.0 
34.2 15.8 
33.9 14.3 
33.8 15.7 
Spell 15:9) 
32.0 16.4 
32.3 16.5 
31.0 16.6 
30.2 15.8 
31.5 16.1 
33.9 15.7 
31.4 16.2 
32.5 16.0 
3 Note in Callospermophilus trepidus as compared with Callospermophilus 
chrysodeirus chrysodeirus the larger size and greater ratio of the length of 
tail vertebrae to total length. 
