82 The Ornithology of Chester County 
Spring departure—May 16 (1906)—May 23 
(1917): 
Fall arrival and departure—Sept. 19 (1893)— 
Octs'$ C1G05)): 
162. Guiraca caerulea caerulea 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. 
16 yrs. May 12. 
Common—May 6 (1897)—May 30 (1900) ; 
AVE. 2 iV tSu Vay ok y. 
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 Dhickcissel, “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 
