106 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. Sharples 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., vil, 70). 
228. Troglodytes aedon aedon House Wren, 
‘SJackywren,” “jennywren,” “little wren.” Common 
summer resident. Nesting data: Berwyn, June 1, 
1892; six eggs. It is interesting to note in com- 
