AMERICAN WAr.r.LERS. 13.3 



songs are quite feeble. Sometimes the to-ivechei- of the usual 

 song is added to this harsh lay. On June 23, 1904, I heard a 

 song given by this species which may be rendered by the syl- 

 lables, ah sive swe swe to-wecher, 



Prairie Warbler. Song heard on June 3, 1903, ze ze 

 ze ze jiip-ta, a little ascending on the last two syllables, other- 

 wise a monotone. Again, sung by the same bird, a little as- 

 cending from first to last, but not at all musical. The Prai- 

 ries begin to sing on the Bahamas about the middle of March. 



It breeds from Florida to Massachusetts and possibly on 

 some of" the Bahamas. 



Lawrence's Warbler. In Bird Lore for July and Au- 

 gust, 1904, page 131, is an article on the nesting together of 

 a male Lawrence's Warbler and a female Blue-winged, by Mr. 

 Isaac Bildersee. Now, while at first sight, the facts as far as 

 they were apparent from observation, are strongly in favor of 

 the theory of the hybridization of the two species mentioned, 

 the careful student will see that there still remains much to be 

 explained. So much, in fact, that, while such observations as 

 those made by Mr. Bildersee are of great value, they must be 

 regarded as only one link in a chain, but much more evidence 

 must be accumulated before we can decide to which of the 

 three theoretic chains, given on pages 85-88, this particular 

 link belongs. 



