522 INDEX. 



Page. 



Reithrodontonays, fulvescens 459 



laceyi 458 



longicauda 457, 464 



megalotis 457, 460 



deserti 462 



group 456, 457, 463 



mexicanus group 456, 463 



intermedius 457 



pallidus 456, 457, 465 



Pthamnus crocea - 64 



insularis 64 



purshiana 64 



Rhiis integrifolia 63 



Ricefield mouse, itllen 455 



Texas 454 



Rillito Creek, Arizona 17 



Rio Grande, Chihuahua 81 



ground squirrel 328 



Road-crossing of the Santa Cruz River, Sonora 106 



Roath, Captain W. D., commanding rcvenuc-cvUtor Wolcott 5 



Robinia neomexicana 62 



Rock-squirrel 306, 315 



Nuevo Leon 324 



Texas • 323 



Rocks from the Mexican Boundary Region, report on 4 



Rocky Mountain bighorn 235 



Rodents 247 



Sahuara 64, 65 



Salix amygdaloides 46 



argophylla 46 



fluviatilis 46 



laevigata 46 



lasiolepis 47 



nigra 45 



nuttallii 47 



occidentalis longipes 45 



taxifolia 46 



Salton River 21, 28, 29 



Sea 28,29 



Sambucus callicarpa 68 



glauca 69 



mexicana • 68 



San Bernardino 13 



Mountain ground-squirrel 313 



Ranch - 95 



collections made at 96 



River, Mexico, flora of : 13, 16, 29, 96 



Springs 12, 13, 14, 16, 95 



Valley 14 



San Clemente iron wood 56 



mouse 400 



San Clemente Island, California 10, 23, 130, 139 



birds of 141 



