1916] Dici : Land Vertebrates of Souflieastern Wasltixgton 



303 



occur and one or the otlier is dominant, depending on whether the 

 region is dominated by sagebrush or bunchgrass. In general the 

 habitat is strikingly arid. 



The species of the rocky-slope association are few in number and 

 represent species which in general show a fondness for the neighboi-- 

 hood of rocks. 



In ten traps set among rocks on a steep hillside three miles south- 

 east of Wallula oue Peromnjscus maniculatus gambelii was taken on 

 June 16, 1914. 



WILLOW HABITAT A^^D ASSOC 

 Exclusive: 



Colinus virginianus virginianus — 



resident. 

 Asio wilsoniamis — resident. 

 Otus asio macfarlanei — summer. 

 Colaptes cafer eollaris — summer. 

 Cor\^^s braehyrhynehos hesperis — 



summer. 

 Molothrus ater artemisiae — 



summer. 

 Melospiza melodia merrilli — 



resident. 

 Zamelodia raelanocepliala — summer. 

 Passerina amoena — summer. 



Major : 



Zenaidura maeroura marginella — 



summer. 

 Tyrannus tyrannus — summer. 

 Tyrannus verticalis — summer. 

 Pica pica hudsonia — resident. 

 Icterus bullocki — summer. 



Minor: 



Tliaumophis elegans. 



Heported: 



Pituophis catenifer catenifer. 



I AT ION (SAGEBRUSH AREA) 



Dendroica aestiva aestiva — 



summer. 

 Icteria virens longicauda — summer. 

 Dumetella carolinensis — summer. 

 Penthestes atricapillus .septentrion- 



alis — resident. 

 Planestieus migratorius propiu- 



quus — summer. 

 Sorex vagraiis dobsoui. 

 Reithrodontomys megalotis 



nigrescens. 

 Mus musculus mUseuIus. 



Euphagus cyanocephalus — 



summer. 

 Mephitis occidentalis major. 

 Peromyscus maniculatus gambelii. 

 Tliomoniys columbianus. 



Sylvilagus nuttallii nuttallii. 

 Erethizon epixanthum epixanthum. 



The timber found along the Walla Walla River near Wallula is 

 made up largely of willows (Salix) of several species. Cottonwoods 

 (Populus trichocarpa) are rare and so are many of the shrubs which 

 grow along the streams nearer the Blue Mountains. The habitat is 

 limited in extent and does not usually extend more than a few rods 

 from the banks of the river, when it ceases abruptly and gives place to 

 the sagebrush. The willows are mostly small in size and grow very 



