Annotated List 85 



Arrival Mar. 27 (1913) Apr. 30 (1905); 

 ave. 13 yrs. Apr. 18. 



Common Apr. 18 (1889) May 4 (1901); 

 ave. 5 yrs. Apr. 28. 



Departure Aug. 18 (1900) Sept. 24 (1896); 

 ave. 7 yrs. Aug. 26. 



169. Petrochelidon lunifrons lunifrons Cliff Swal- 

 low, "barn swallow," "eave swallow," "mud swal- 

 low." Not common transient, and rather rare and 

 altogether local summer resident ; formerly consider- 

 ed common. Pennock states that four or five sta- 

 tions about Kennett Square and one at Lenape are 

 deserted (Cass., vi, 52) ; Sharpies remembers a 

 colony in 1870 on the S. E. wall of an old mill at 

 Milltown, near West Chester; and Wilson reports 

 that in 1880, fifteen or sixteen pairs came to an old 

 stone building on the mill property of David Y. 

 Wilson, West Marlborough Twp., and built their 

 nests for three or four years. A set of five eggs was 

 taken near Berwyn, July 25, 1896. Warren states 

 that it arrives Apr. 28 to May 3. 



170. Hirundo erythrogastra Barn Swallow. Com- 

 mon summer resident, less commonly than formerly 

 however. Completed nests by May 13. 



Berwyn : 



Arrival Apr. 13 (1912) May 3 (1907) ; ave. 

 25 yrs. Apr. 22. 



Common Apr. 15 (1912) May 9 (1904); 

 ave. 23 yrs. Apr. 28. 



Departure Aug. 19 (1898) Sept. u (1902); 

 ave. 7 yrs. Aug. 29. 



171. Iridoprocne bicolor Tree Swallow, "white- 



