INDEX. 525 



Sonoran harvest-mouse 459 



Life Zone (17. 68 



Sonoyta, Sonora L8, 115 



i 'i mouse 143 



plains mouse 384 



Sonoyta River I Hi. 1 17 



lagunas of 1 1!» 



Valley 117. J is 



\ egetation of I Hi. lis 



Sophora secundiflora <il 



Spanish Bayonel . Texas -1:5 



Spermophile. (See Ground-squirrel. 



Spermophilus 297 



beecheyi. i S< < * >tospermophilus. 

 buckleyi. (See Otospermophilus.) 



canescens '■'-'■'■'< 



chrysodeirus brevicaudus 313 



miliums. (See Otospermophilus. i 

 harrisii. (See Ammospermophilus. I 



saxicolus. (Set Ammospermophilus.) 

 leucurus. ^" Ammospermophilus.) 

 mexicanus parvidens. (See Citellus.) 



sonoriensis 337 



spilosoma annectens. i Set Citellus. i 

 arens. (See Citellus. i 



marginatum :;:!1 



tereticaudus. (See Citellus. ) 

 tridecemlineatus texensis. (Se< Citellus.) 



(xerospermophilus) microspilotus 333 



Spruce, douglass. 39 



Squirrel, Alien pine.- 250 



Allen 269 



Anthony gray 264 



Apache 270 



Arizona gray 273 



1 [uachuca 277 



Texas fox 28] 



Squirrels 217 



Eox 281 



red 256 



-lender 268 



western gray 264 



Station No. I i Fori Worth, Texas) 



No. 2 i Fori Clark, Texas) 75 



No. 3 i Fori Eancock, Texas i 77 



No. I (Belen station, Texas) - - 79 



No. 5 i El Paso, Texas) 79 



No. 6 (Rio Grande, Chihuahua) 81 



No. 7 i near Wragg's Ranch, Texas i 81 



No. 8 (Palomas Lakes, Chihuahua) 82 



No. 9 near < iolumbus, New Mexico) 83 



No. 10 (< arrizalillo Springs, New Mexico 



No. II (Upper Corner Monument) - s l 



No. L2 i Big Eatchet Mountain, New Mexico] 



