INDKX. 529 



Tract, Yaqui Basin Subtropical !'■'>. 7 1 



Tracts, differentiation 7:; 



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



Tree, Fremonl 63 



Trees of the Animas Mountains 91 



chart showing distribution on west side of 92 



Fori < lark. Texas '. 75 



introduced species of 69 



Tres Bellotas Canyon Is 



Tres Hermanas Mountains 30 



Trinity River 9 



Trinodontomys 384, 394, 395 



Tronadora 70 



Tropical Region 70, 71, 72 



Tucson. Arizona 15.17,18,108 



flora of 108 



picturesque appearance of vegetal ion at 108 



reptiles and batrachians from L09 



Tule Desert 19 



Mountains 19, 120 



reptiles in Jl'1 



Wells, Arizona is. 1 20 



Tumacacori Mission. Arizona 17. 107 



Ulmus crassi folia 54 



Umbel lularia californica 



Ungnadia speciosa 63 



Ungulata 158 



Unlucky Lake, California 21, L31 



Upper Corner Monument ' M 



Upper Sonoran Life Zone :!7. 1 1 . 50, 5 1 . 52, 59, 62, 68 



Valle, Felipe. International Boundary Commissioner 1 



Vaquelinia ">7 



californica 57 



Vole, Arizona 500 



( ialifi irnia : 198 



Graham Mountain 500 



Guadalupe Mourn a in 501 



Mogollon Mountain 501 



San Francisco Mountain 500 



Voles 193 



Wagner, Frank, hospital steward il 



Walnut . western II 



Warsaw Mills. Arizona ' IS. Ill 



Western Desert Tract :;<i. 7:;. 7 I 



White Pine. Mexican 36 



Whitewater, Chihuahua II. 1l>. 15,88 



vegetation of 88 



W ilcox, Major Timothy E 6, L02 



Willow, almondleaf Hi 



Bigelow (7 



black 45 



canescent 46 



30639— No. 56— 07 m 34 



