I02 The Ornithology of Chester County 



Arrival — Apr. 23 (1910) — May 9 (1894) ; ^.ve 

 20 yrs. Apr. 30. 



Common — Apr. 29 (1914) — May 2i (1899) 

 ave. 13 yrs. May J2. 



Bulk depart — Sept. 4 (1894) — Sept. 25 (1895) 

 ave. 6 yrs. Sept. 16. 



Last seen — Sept. 19 (1893) — Oct. 11 (1897) 

 ave. 14 yrs. Oct. 2. 



217. Icteria virens virens Yellow-breasted Chat 

 "chat," "oriole." Tolerable common summer resi- 

 dent; inclined to nest in small colonies. Nidifica- 

 tion commences by May 20; average date for com- 

 plete set, May 30. 



Benvyn : 



Arrival — May 2 (1904) — May 19 (1917) ; ave, 

 12 yrs. May 9. 



Common — May 12 (1905) — May 26 (1914) 

 ave. 9 yrs. May 16. 



Bulk depart — ^Aug. 8 (1900) — Sept. 4 (1894) 

 ave. 2 yrs. Aug. 21. 



Last seen — ^Aug. 21 (1896) — Sept. 4 (1894) 

 •ave. 3 yrs. Aug. 27. 



2 1 8. fVihonia citrina Hooded Warbler. Not 

 common transient. A female taken at Berwyn, May 

 II, 1898 (No. 644, coll. F. L. B.). 



The only autumnal record I have is that of an 

 adult male found dead in a yard in West Chester 

 Sept. 28, 1915, by R. P. Sharpies, and novf in the 

 possession of Miss Sara DeHaven. 



Spring arrival — May i (1909) — May 4 (1912) ; 

 ave. 4 records May 3. 



Spring departure — May 11 (1899-1909-1910) — 



