Appendix, 



b" . Top of head black, often with a 

 lighter hne down the center. 



Black-headed Grosbeak . 137 

 b'. Bill flattened. 



a" , Top of head with concealed 

 patch of scarlet. 



Western or Cassin's Kingbird 



71-72 



c' , Bill slender; head and throat ashy 



or slaty gray; no marking except 



white on eyelids, and black between 



bill and eye; back olive-green. 



Macgillivray's Warbler 167 



Entire head yellow. Back gray; breast 

 whitish. 



a'. Back spotted and streaked with 

 black; a large black throat-patch and 

 gray breast. White wing bars. 



Hermit Warbler . 166 



b' , No black ; patch of chestnut on 

 wing-coverts. 



Verdin; Gold-tit . 193 



Rump yellow. 

 a' . Bill slender; size small. 

 a'\ Throat white. 



Yellow-rumped Warbler 162 

 b" , Throat with at least a trace of 

 yellow; in full plumage bright 

 yellow. 



Audubon's Warbler . 163 



b\ Bill immensely thickened; size larger 

 than a sparrow. 



Evening Grosbeak . 103 



246 



