76 The Ornithology of Chester County 



Departure — Oct. 9 (1890-1895-1899-1896) — 

 Dec. 22 (1887) ; ave. 7 yrs. Oct. 25. 



146. Passerculus sandwichensis savanna Savannah 

 Sparrow. Transient; Michener, Warren and Pen- 

 nock consider it common, while Montgomery found 

 it abundant in spring and fall. At Berwyn it is not 

 at all common, and migration records from all 

 sources all too scanty. 



Spring arrival — Mar. 28 (1889) — Apr. 18 

 (1891-1915) ; ave. 8 yrs. Apr. 12. 



Spring departure — Apr. 13 (1886) — May 9 

 (1891) ; ave. 5 yrs. Apr. 21. 



Fall date, Nov. 4, 1902. 



147. Ammodramus savannarum australis Grass- 

 hopper Sparrow, "ground chippy," "yellow-winged 

 bunting," "yellow-winged sparrow." Tolerably 

 common summer resident; rather local, breeding in 

 small colonies in grass fields. Nesting data: June 

 4, 1884, Willistown, four eggs; taken by W. S. 

 Hall. 



Berwyn : 



Arrival — ^Apr. 21 (1893) — May 3 (1917) ; ave. 

 12 yrs. Apr. 28. 



Common — May 8 (1909-16) — May 21 (1913); 

 ave. 7 yrs. May 11. 



Departure — Oct. 6 (1905) — Oct. 7 (1917) ; ave. 

 2 yrs. Oct. 7. 



148. Passerbulus henslowi henslowi Henslow's 

 Sparrow. Rare transient, and so listed by all au- 

 thorities. I have a female taken at Berwyn, Oct. 

 23, 1896 (No. 615, coll. F. L. B.). Hunt ob- 

 served six pairs at Cupola, Apr. 24, shot one on the 



