78 The Ornithology of Chester County 



Departure Mar. 16 (1901) Apr. 21 (1887); 

 ave. 17 yrs. Apr. 9. 



152. Spizella passerina passerina Chipping Spar- 

 row, "bush sparrow," "chippy," "chip sparrow," 

 "hairbird," "honeysucklebird," "house sparrow," 

 "tit," "tree sparrow." Abundant summer resident. 

 Nidification commences May 5 ; average date for 

 complete set, May 15. 



Berwyn : 



Arrival Mar. 2 (1909) Apr. 18 (1891) ; ave. 

 32 yrs. Mar. 30. 



Common Mar. 29 (1907-1914) Apr. 29 

 (1891) ; ave. 29 yrs. Apr. 10. 



Bulk departure Sept. 20 (1906) Oct. 21 

 (1902) ; ave. 8 yrs. Oct. 8. 



Last seen Sept. 29 (1898) Oct. 28 (1891); 

 ave 19 yrs. Oct. 14. 



153. Spizella pusilla pusilla Field Sparrow, 

 "bush sparrow," "field chippy," "field sparrow," 

 "ground chippy." Abundant summer resident, oc- 

 casional resident. Average date for set of eggs, May 

 1 8. 



Berwyn : 



Arrival Mar. 6 (1906) Apr. 15 (1887) J ave. 

 30 yrs. Mar. 29. 



Common Mar. 24 (1903) Apr. 29 (1891); 

 ave. 30 yrs. Apr. 5. 



Bulk departure Sept. 26 (1904) Oct. 23 

 (1895); ave. 13 yrs. Oct. 13. 



Last seen Oct. 6 (1904) Nov. 29 (1887); 

 ave. 20 yrs. Oct. 22. 



154. Junco hy emails hyemalis Slate-colored Junco, 



