AMERICAN WARBLERS. 133 



APPENDIX 



Additional study of the American Warblers has caused me to make 

 the following corrections. 



The tongue is thinner and more horny in the Redstart than in any 

 other species in the family ( see page 3, last paragraph, also page 126 and 

 Fig. 56, V, page 125. 



The vocal muscles are sometimes more in number than I have stated 

 on page 4. Thus, rather unexpectedly, I find that in the Redstart there 

 are five pairs of singing muscles ( see page 127 ). 



On page 4 I have spoken of the song of the Prairie Warbler as being 

 "exceedingly -sweet ". When I made this statement I probably had in 

 mind the song as I heard it on the Bahamas and among the Florida Keys 

 ( see page 52 ). I would not now apply so extravagant a term as " exceed- 

 ingly sweet " to the song of this species. 



The lining membrane of the stomach of some species of warblers is 

 sometimes hard, as in the Redstart, Chestnut-sided and other Wood War- 

 blers. 



The following are additional notes to the habits, songs, 

 etc., of the various species. 



Black and White Warbler. In June, 1901, I found a 

 nest of this species in Auburndale. It was placed near the 

 the base of a low shrub in a thicket of small trees and bushes. 

 The female was sitting on the nest which was so nearly dome- 

 shaped that the bird could only be seen from directly in front. 

 She was very tame and did not move even when I stooped to 

 examine her, and it was not until I had nearly placed my hand 

 on her that she flew off. She then quietly retreated to a low 

 shrub near, but without exhibiting any signs of alarm, nor did 

 she appear at all disturbed when the members of my bird class 

 looked at her eggs. Later I took other classes to see the 

 nest when the bird behaved much as at first. She succeeded 

 in rearing a brood of young. On May 12, 1904, I fotmd anoth- 

 er nest not far from the one mentioned above, but it was in 

 an open woodland near the foot of a tree, and was not con- 



