BIRDS- OF PENNSYLVANIA. 249 



299. Polioptila ccerulea (Linn.). 



Blue-gray Gnatcateher. 75L Rare visitor from the south in spring, 

 summer and fall. Probably breeds. 



Family TuBDiDJii. The Thrushes, Bluebirds, etc. 



300. *Turdus mustelinus Gmel. 



Wood Thrush. 755. 



301. T. fuscescens Steph. 



Wilson's Thrush. 756. Common migrant spring and fall. 



302. T. alicicB Baird. 



Gray-cheeked Thrush. 757.* Migrant, spring and fall. 



303. T. ustulatus swainsonii (Cab.). 



Olive-backed Thrush. 758a. Migrant, spring and fall. 



304. T. aonalaschkce pallasii (Cab.X 



Hermit Thrush. 7596. Common spring and fall migrant ; specimens have 

 also been taken during mild winters. 



305. *Merulamigratoria (Linn.). 



Robin. 76L Resident 



306. *Sialia sialis (Linn.). 



Bluebird. 766. Resident 



NOTE. On different occasions during the past twenty years the following named 

 species have been introduced to Pennsylvania with a view to their naturalization. 

 The attempted naturalization of these birds, other than the English Sparrow, has 

 been unsuccessful. 



1. Tympanuchus americanus (Rich.'*. 



Prairie Hen. 305. 



2. Alauda arvensis Linn. 



Skylark [473]. 



3. Coturnix coturnix (Linn.). 



European or Migratory Quail. 



4. Passer domesticus (Linn.). 



English or European House Sparrow. 



ADDENDA. 



Since this list has been printed I find that three species all common summer resi- 

 dents have been omitted. The families to which these birds belong and their names 

 are as follows : 



Family FRINGILLID^;. 



307. *Spizella socialis (WiLS.). 



Chipping Sparrow. 560. 



Family VIREONID.E. 



308. *Vireo gilvus (ViEiLi,.). 



Warbling Vireo. 627. 



Family PARID^I. 



300. *Parus atricapillus LINN. 



Chickadee. 735. Common resident. 



*Turdus alicice tricknelli Ridgw. (Bicknell's Thrush), probably occurs in the mountainous re- 

 gions of this State, as a summer resident. 



