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NATURALIST'S GUIDE TO THE AMERICAS 



Troglodytes brunneicollis cahooni, Ca- 

 hoon's wren. 



Catharus occidentalis olivascens, olive 

 nightingale thrush. 



Ridgwayia pinicola, Ridgway's thrush. 



Sialia mexicana bairdi, chestnut-backed 

 bluebird. 



Cyanocitta stelleri diademata, long- 

 crested jay. 



Dendroica auduboni nigrifrons, black- 

 fronted warbler. 



Junco phaeonotus phaeonotus, Mexican 

 junco. 



Melospiza melodia goldmani, Goldman's 

 song sparrow. 



j. Sonoran District (Lower Austral 

 Zone). Arid plains and' low mountains 

 of Sonora, an extension of the desert 

 region of southwestern Arizona, allied 

 to the Tamaulipan District. 



Plants 



Ephedra trifurca. 



Washingtonia sonorae, palm. 



Yucca schottii. 



Celtis pallida, desert hackberry. 



Atriplex linearis. 



Prosopis pubescens, screwpod mesquite, 



tornillo. 

 Prosopis julijlora velutina, mesquite. 

 Acacia wrightii, catsclaw, una de 



gato. 

 Pithecolobium sonorae, una de gato. 

 Hoffmanseggia microphylla. 

 Cercidium torreyanum, palo verde. 

 Eysenhardtia polystachya. " 



Parosela spinosa, indigo-bush. 

 Olneya tesota, ironwood, palo de hierro. 

 Erythrina flabellijormis, colorin. 

 Covillea glutinosa, creosote-bush, 



Gobernadora. 

 Koeberlinia spinosa, corona de cristo. 

 Fouquieria splendens, ocotillo. 



Mammals 



Pipistrellus hesperus hesperus, little 



western bat. 

 Canis mearnsi, Mearns' coyote. 

 Felis pardalis sonoriensis, ocelot, ti- 



grillo. 

 Lynx ruffus baileyi, desert wildcat. 

 Peromyscus eremicus eremicus, desert 



mouse. 

 Sigmodon hispidus eremicus, western 



desert cotton rat. 

 Neotoma albigula melanura, Sonoran 



wood rat. 

 Thomomys sinaloae, . Sinaloa pocket 



gopher. 

 Perognathus penicillatus pricei, Price's 



pocket mouse. 

 Dipodomys merriami merriami, Mer- 



riam's kangaroo rat. 



Citellus tereticaudus, Yuma ground 



squirrel. 

 Ammospermophilus harrisii saxicola, 



Mearns' white-lined ground squirrel. 

 Lepus californicus eremicus, Arizona 



jack rabbit. 

 Pecari angulatus sonoriensis, Sonoran 



peccary. 

 Odocoileus hemionus eremicus, desert 



mule deer. 



Birds 



Lophortyx gambeii, Gambel's quail. 

 Psittacula cyanopygia pallida, Sonoran 



parrotlet. 

 Ainazona albifrons saltuensis, Sonoran 



parrot. 

 Micropallas whitneyi whitneyi, elf owl. 

 Colaptes chrysoides mearnsi, Mearns' 



gilded flicker. 

 Centurus uropygialis uropygialis, Gila 



woodpecker. 

 Otocoris alpestris pallida, pallid horned 



lark. 

 Heleodytes brunneicapillus brunneicapil- 



lus, Guaymas cactus wren. 

 Toxostoma curvirostre palmeri. Palmer's 



thrasher. 

 Toxostoma lecontei lecontei, Leconte's 



thrasher. 

 Polioptila plumbea, plumbeous gnat- 

 catcher. 

 Dendroica aestiva sonorana, Sonoran 



yellow warbler. 

 Megaquiscalus major nelsoni, Sonoran 



boat-tailed grackle. 

 Icterus cucullatus nelsoni. Nelson's oriole. 

 Amphispiza bilineata deserticola, desert 



sparrow. 

 Melospiza melodia fallax, desert song 



sparrow. 

 Pyrrhuloxia sinuata sinuata, pyrrhu- 



loxia. 

 Richmondena cardinalis superba, Arizona 



cardinal. 



k. Tamaulipan District (Lower Austral 

 Zone). Lower part of Rio Grande 

 Valley and the plains and low moun- 

 tains of northeastern Mexico largely in 

 Tamaulipas, but extending into Nuevo 

 Leon and Coahuila, south to a point a 

 short distance north of Tampico. Gen- 

 erally arid in climate, allied to the Son- 

 oran District. 



Plants 



Ephedra aspera, pitamoreal. 



Yucca australis. 



Celtis pallida, desert hackberry. 



Atriplex matamorensis. 



Prosopis julijlora glandulosa, mesquite. 



Acacia wrightii, catsclaw, una de gato. 



