INDEX. 



529 



Page. 



Tract, Yaqui Basin Subtropical 73, 74 



Tracts, differentiation 73 



Transition Zone 39, 52, 56, 62, 68, 71 



Tree, Fremont 63 



Trees of the Animas Mountains 91 



chart showing distribution on west side of 92 



Fort Clark, Texas 75 



introduced species of j 69 



Tres Bellotas Canyon ,.- . . 18 



Tres Hermanas Mountains 30 



Trinity Eiver 9 



Trinodontomys 384^ 394^ 395 



Tronadora 70 



Tropical Eegion 70, 71, 72 



Tucson, Arizona 15, 17, 18, 108 



flora of 108 



picturesque appearance of vegetation at 108 . 



reptiles and batrachians from 109 



Tule Desert 19 



Mountains ; 19, 120 



reptiles in 121 



Wells, Arizona. 18, 120 



Tumacacori Mission, Arizona 17, 107 



Ulmus crassifolia 54 



Umbellularia califomica 56 



Ungnadia speciosa 63 



Ungulata 158 



Unlucky Lake, California 21, 131 



Upper Corner Monument 84 



- Upper Sonoran Life Zone 37, 41, 50, 51, 52, 59, 62, 68 



Valle, Felipe, International Boundary Commissioner 1 



Vaquelinia '. 57 



californica : , 57 



Vole, Arizona .s 500 



California 498 



Graham Mountain 500 



Guadalupe Mountain 501 



MogoUon Mountain 501 



San Francisco Mountain , - - 500 



Voles ----: 493 



Wagner, Frank, hospital steward 6 



Walnut, western .■ - 44 



Warsaw Mills, Arizona .' - ^°' m 



Western Desert Tract - - 36, 73, 74 



White Pine, Mexican - - - - ■ - 36 



Whitewater, Chihuahua 11, 12, 15, 88 



vegetation of -^,- 88 



Wilcox, Major Timothy E : *'? 6, 102 



Willow, almondleaf 46 



Bigelow ■ ' 47 



black - 45 



canescent - ■ 46 



30639-No. 56-07 M 34 



