UNIVERSITY OF CALIFORNIA 
MUSEUM OF VERTEBRATE ZOOLOGY 
BERKELEY, CALIFORNIA, 
December 3,09 
Mr.William Brewster, 
1 45 Brat tie St ., 
0ambridge. Mass 
My de ar Mr.Brews t er : ~ 
The two warblers came safely to hand today and I am 
returning them to you at once by registered mail. I find’ 
that the specimen marked sonorana is precisely like eight 
others that we have here from Los Angeles, Witch Creek and 
other localities in California. All of these are females in 
first winter plumage and I have considered them to be 
nothing more than Brew ster! . The bright yellow specimen 
which you submit I take to be an adult female in winter 
plumage of the same form. 
If your record specimen is truly so nor ana then this form 
occurs widely through California, but this is not to be 
expected . 
Frankly, I doubt your determination and have decided to 
put your record of son orana under Brew steri unless further 
evidence to the contrary is forthcoming. 
Very truly yours 
