io6 The Ornithology of Chester County 



24 yrs. Apr. 22. 



Common Apr. 24 (1916) May 18 (1889); 

 ave. 13 yrs. May 4. 



Bulk departure Sept. 3 (1909) Oct. i 

 (1915) ; ave. 4 yrs. Sept. 16. 



Last seen Sept. 12 (1903) Oct. 26 (1889); 

 ave. 24 yrs. Sept. 29. 



226. Thryothorus ludovicianus ludovicianus Car- 

 olina Wren, "ground pewee," "wren." Resident; 

 most erratic, sometimes almost abundant in the fall ; 

 frequently scarce or absent. I have records of its 

 occurrence in all months in the year except January 

 and especially common in August and September, at 

 Berwyn, after several years of scarcity or absence; 

 during the seasons of 1902-06; after which it has 

 again become casual. It is a rather scarce breeder: 

 Jackson found it nesting in an outhouse at Edge's 

 mill, Beaver creek; in a shed at Edw. Swayne's 

 home, West Bradford, and near Laural station on 

 the Brandywine. Sharpies found a pair nesting in a 

 springhouse at Green Hill, 1912; Burn has found 

 but a single nest at Oxford, and Thomas a nest and 

 eggs in a chickenhouse at Kennett Square, summer 

 of 1912. 



227. Thryomanes bewicki Bewick's Wren. Strag- 

 gler. Barnard classes it as very rare and Michener 

 as a resident. The only recent record is by Pennock, 

 Kennett Square, Apr. 19, 1903 (Cass., vii, 70). 



228. Troglodytes aedon aedon House Wren, 

 "jackywren," "jennywren," "little wren." Common 

 summer resident. Nesting data: Berwyn, June I, 

 1892; six eggs. It is interesting to note in com- 



