Annotated List 37 
First spring Feb. 18 (1901)-Mar. 20 (1886). 
Ave. 10 yrs. Mar. 11. 
Last spring Mar. 11 (1901)-Apr. 17 (1913). 
Ave. 10 yrs. Apr. 4. 
First fall Oct. 10 (1905)-Oct. 29 (1909). Ave. 
7 VTS. ets 22: 
Last fall Oct. 17 (1910)-Dec. 15 (1891). Ave. 
Lys. Nov. 13. 
34. Mycteria americana Wood Ibis. A straggler 
from the south. According to Pennock, a specimen 
was taken by the late Vincent Barnard since the 
publication of his list in 1861. 
35. Botaurus leutigincsus Bittern, “Indian hen,” 
“mud hen.” Scarcely common as a transient, Apr. 
11 (1880)-Apr. 26 (1880); Aug. 3 (1887)-Dec. 
8 (1889) ; and rare as a summer resident. Mont- 
gomery closely observed one in May, 1895, and 
Pennock states that specimens have been shot 
throughout the summer months. A specimen said 
to have been taken from a nest and three eggs among 
the tussocks of Doe run, was brought in to be mount- 
ed on May 1, 1897 (Wilson MS.). 
36. Ixobrychus exilis Least Bittern. Rare sum- 
mer resident. Dr. Warren records a specimen taken 
May 20, 1884 (Bds. Pa., 19), and W. L. Baily 
observed one at Paoli, May 11, 1914 (Cass., xviil, 
52). The only breeding record is by L. S. Pierson 
and A. C. Redfield, June 12, 1909; a nest and 
four eggs in a cat-tail swamp at the head of Darby 
creek, near Berwyn (Auk, xxvi, 426), and I had the 
pleasure in verifying the record to my own satis- 
faction the next day, as well as later visits to observe 
