BLACK AND WHITE WARBLER 143 



sion, namely, May 7, 1905, which is also the 

 day of the earliest appearance. In the years 

 1901, 1902, 1904, and 1907 the species was 

 not recorded. May 21 is the latest date on 

 which a visitant has been seen, namely, in 

 1900 and 1903. One bird only has been 

 heard to sing. No visitant has remained 

 to a second day. 



68. Blue-headed Vireo 



Lanivireo solitarius 



The Blue-headed, or Solitary, Vireo has 

 been noted in four of the seasons only, one 

 bird in 1901 and 1903 respectively, and two 

 birds in each of the years 1905 and 1907. 

 Thus there have been six appearances of the 

 species only, and these have occurred be- 

 tween May 13 and 21. In neither instance 

 has the visitant sung or remained over to 

 the next day. 



69. Black and White Warbler 



Mniotilta varia 



The Black and White Warbler, or Black 

 and White Creeper, may be relied upon to 



