508 INDEX. 



Page. 



Cypress, Arizona 41 



bald 40 



Gowen 40 



Dall, W. H. , coauthor of report on mollusca - 3 



Basypodidse 156 



Deer 169 



black-tailed (Crook) 185 



burro , 208 



California mule - 211 



Crook black-tailed 185 



desert mule 208 



Mexican mule 191 



Sonora white-tailed 175 



Texas white-tailed 171 



Descriptions of principal collecting stations 74 



Desert mouse, Apache 438 



Eastern 441 



palm , 427 



San Diego ; 1 436 



Sonoyta , 443 



southern parasitic _ 429 



Tiburon Island .- 444 



Westef n 431 



Deserts of the southwestern interior, vegetation of .• 33 



De^vils Claws. ■. . . 59 



Didelphiidse 150 



Didelphis 150 



key to species of 150 



mesamericana texensis 150 



Virginiana ' 153 



Differentiation Tracts ,• 73 



Diospyros texana 67 



Dog Springs, New Mexico 11, 15, 87 



Mountains 11, 15 



description of 87 



flora of ; 87, 88 



Dutch Charley's Ranch 14, 17. 98 



vegetation at 98 



Eastern Desert Tract 73, 74 



Echinocactus wislizeni ^ 65 



Edentata 156 



Elder, pale 69 



Mexican 68 



Elevated Central Tract 35, 45, 52, 56, 68, 73, 74 



Elk, Arizona 215 



Merriam '. 213 



Elm, cedar 54 



El Nido 22 



El Paso, Texas ■ 9 13 79 



fauna of gO 



flora of 80 



grasshopper mouse 377 



ground-squirrel 301 



