' Annotated List QI 
cation begins a few days after arrival and in the 
fifty or more records in the vicinity of Berwyn, the 
average date for a complete set is May 28. 
Berwyn: 
Arrival—Apr. 30 (1916)—May 14 (1896) ; ave. 
18 yrs. May 7. 
Common—May 5 (1905)—May 19 (1901); 
ave. 13 yrs. May 12. 
Departure—Aug. 29 (1896-1902)—Sept. 2 
(1898) ; ave. 5 yrs. Sept. 1. 
187. Vermivora pinus Blue-winged Warbler. 
Common summer resident, apparently most abund- 
ant in the eastern part of the county, especially about 
Birmingham (Norris, Jr., Orn. and Ool., xiv, 138) 
and Berwyn (Burns, Wils. Bull., 35, 39). Also 
found breeding at Kennett Square, by Phillips (F. 
and S., vi, 215); West Chester, by Rhoads, 
(Goues..B. Ne Ol'C.: ni194)) 7) Wihistown, | by 
Hall (Orn. and Ool., 9, 137). Nidification com- 
mences soon after arrival; average date for com- 
plete set May 29 (Burns in Chapman’s Warblers 
SAGs 67). 
Berwyn: 
Arrival—May 3 (1900-1905 )—May 15 (1896) ; 
ave. 21 yrs. May 6. 
Common—May 3 (1900)—May 17 (1917); 
ave. 12 yrs. May 8. 
Departs—Aug. 13 (1890)—Sept. 6 (1897); 
ave. 4 yrs. Aug. 24. 
188. Vermivora chrysoptera |Golden-winged 
Warbler. Rare transient. I have no fall dates and 
include all spring records available: May 4 (1902) 
