94 The Ornithology of Chester County 



10 yrs. May 6. 

 Common May 7, 1905. 

 Last seen Sept. 19, 1893; Sept. 20, 1894. 



195. Dendroica carulescens carulescens Black- 

 throated Blue Warbler, Common, sometimes abun- 

 dant, transient. 



Spring arrival May I (1912) May 21 

 (1899) ; ave. 18 yrs. May 8. 



Common May 7 (1909-1914-1916) May 23 

 (1899); ave - 1 6 yrs. May 12. 



Departure May 8 (1909) June 3 (1917); 

 ave. 14 yrs. May 18. 



Fall arrival Sept. 8 (1898) Sept. 28 (1914); 

 ave. 7 yrs. Sept. 16. 



Common Sept. 8 (1898) Sept. 28 (1913); 

 ave. 2 yrs. Sept. 18. 



Last seen Sept. 16 (1905) Nov. 4 (1917); 

 ave. 1 6 yrs. Sept. 27. 



196. Dendroica coronata Myrtle Warbler, "yel- 

 low-rump" Common transient, occasional winter 

 visitant. 



Berwyn : 



Spring arrival Apr. 7 (1893) May 2 (1914) ; 

 ave. 8 yrs. Apr. 24. 



Common May 4 (1888) May v 12 (1906); 

 ave. 6 yrs. May 6. 



Departure Apr. 30 (1916) May 17 (1917); 

 ave. 10 yrs. May 9. 



Fall arrival Sept. 5 (1888) Sept. 30 (1911); 

 ave. 4 yrs. Sept. 21. 



Last seen Oct. 8 (1908) Oct. 27 (1893) ; ave. 

 7 yrs. Oct. 18. 



