82 



University of California Publications in Zoology [Vol.12 



sandy creosote, and the stony, or rocky, creosote ; but by giving weight 

 to similarities, as well as to differences, such distinction could be of 

 but minor rank. Expediency seems to argue against further refine- 

 ment in the present stage of study. Then, too, no such precise statis- 

 tical gathering of data as regards the animals has yet been done as 

 would warrant the exercise of such fine analysis. 



Catclaw (or wash) Association 



BIRDS 



Lophortyx gambeli: min.; resident 



Zenaidura maeroura marginella : mill. ; 

 winter 



Bubo virginianus pallescens: max.; 

 resident 



Geocoecyx californianus: max.; resi- 

 dent 



Dryobates scalaris cactophilus: min.; 

 resident 



Phalaenoptilus nuttalli nuttalli: min.; 

 winter 



Phalaenoptilus nuttalli nitidus: min.; 

 resident 



Archilochus alexandri: min.; summer 



Calypte eostae: min.; summer 



Myiarehus cinerascens cinerascens: 

 min.; summer 



Icterus cucullatus nelsoni: min.; tran- 

 sient 



Icterus bullocki: min.; transient 



Carpodacus mexicanus frontalis: 

 max. ; resident 



Astragalinus psaltria hesperophilus: 

 max.; resident 



Zonotrichia leucophrys leucophrys: 



max. ; transient 

 Zonotrichia leucophrys gambeli : min. ; 



winter 

 Zamelodia melanocephala melanoce- 



phala: min.; transient 

 Phainopepla nitens: min.; resident 

 Lanius ludovicianus excubitorides: 



max.; resident (?) 

 Lanivireo solitarius cassini: min.; 



transient 

 Oreoscoptes montanus: min.; winter 

 Mimus polyglottos leucopterus: min.; 



winter 

 Heleodytes brunneicapillus couesi: 



max.; resident 

 Thryomanes bewicki eremophilus: 



max.; winter 

 Auriparus flaviceps flaviceps: max.; 



resident 

 Polioptila caerulea obscura: max.; 



winter 

 Polioptila plumbea: max.; resident 



Odocoileus hemionus eremicus: max. 

 Peromyscus eremicus eremicus: min. 

 Dipodomys merriami merriami: min. 

 Perognathus formosus: min. 

 Perognathus penicillatus penicillatus: 



Perognathus spinatus spinatus: min. 

 Lepus ealifornieus deserticola: min. 

 Lynx eremicus eremicus: min. 

 Urocyon cinereoargenteus scotti: min. 

 Pipistrellus hesperus hesperus: min. 



Remarks upon tin Cult Jaw (or Wash) Association. — Except for 

 the Bill Williams and Gila rivers the Needles-to-Yuma section of the 

 Colorado River receives no tributary stream, save as an immediate 



