Plate I. 



Sage brush and yucca covered plains at the Nebraska-Colorado liuv- 

 west of Haigler. the dry bed of the Arickares in the distance. July 10, 

 1911. J. T. Zinimer. 



Fii:-l lisf ol ;-au(_lliill> l:a( k luuii ili- li;-d of ilie Arifkarte northeast of 

 Haigler. .July 11. 1911. J. T. Zinimer. 



