UNIVERSITY OF CALIFORNIA 



[GRINNELL-STORER I PLATE 50 



v^ 



The X'ireos of the Yoseniite section. Photographed fiom fii'shly takin 

 specimens, about ff, natural size. 



(t. Cassin A'ireo ; Pleasant A'alley, May 2;), 191."). 



h. Western Warbling Yireo; Pleasant Valley, May 2'.~\, 191.5. 



r. Hutton Yireo; EI Portal, December 8, 1914. 



d. California Least Yireo; Snelling, May 29, 191o. 



For discussions of com[)arative field characters, see pp. .■)()9j ;"'12, oil!, -IH. 



[727] 



