82 The Ornithology of Chester County 



Spring departure May 16 (1906) May 23 



(1917). 



Fall arrival and departure Sept. 19 (1893) 

 Oct. 5 (1905). 



162. Guiraca ceerulea ceerulea Blue Grosbeak. 

 Straggler from the south. Appears on Michener's 

 lists, and Warren took a specimen in the lower part 

 of the county on May 10, about 1885 (Bds. Pa., 

 1890, 248). 



163. Passerina cyanea cyanea Indigo Bunting, 

 "bluebird," "blue bunting," "indigobird," "green- 

 bird." Common summer resident. Nest with eggs 

 May 27-June 18. 



Berwyn : 



Arrival May 3 (1895) May 20 (1886) ; ave. 

 1 6 yrs. May 12. 



Common May 6 (1897) May 30 (1900); 

 ave. 12 yrs. May 17. 



Bulk departure Sept. 5 (1904) Oct. 6 

 (1914) ; ave. 6 yrs. Sept. 21. 



Last seen Sept. 30 (1906) Dec. 3 (1914); 

 ave. 8 yrs. Oct. 9. 



164. Spiza americana Dickcissel, "black-throated 

 bunting," "Maybird." Formerly a summer resident, 

 localized in the southern and eastern parts of the 

 county. Michener considered it common, and Bar- 

 nard records its arrival on Apr. 27 to May 3 ; War- 

 ren, in his list of 1879-80, remarks that he found 

 it rare and not breeding. A nest with eggs was 

 found by Phillips, near Avondale, July 4, 1871 (F. 

 and S., vi, 67) ; a nest and eggs was taken from a 

 currant bush near the county line, Eagle hotel 



