64 The Ornithology of Chester County 



no. Archilochus colubris Ruby-throated Hum- 

 mingbird, "hummingbird." Tolerable common 

 summer resident. Nest and two eggs, Berwyn, June 

 10, 1899. Also Berwyn migration data: 



Arrives — May 11 (1886) — May 22 (1917); 

 ave. 17 yrs. May 15. 



Departs — Aug. 24 (1913) — Oct. 9 (1887) ; ave. 

 17 yrs. Sept. 5. 



111. Tyrannus tyranus Kingbird, "beebird," 

 "icingbird," "tweet," "tyrant flycatcher." Tolerable 

 common summer resident. My Berwyn migration 

 data may average a few days later than that of the 

 southern parts of the county. 



Arrival — Apr. 20 (1895): — May 20 (1917); 

 ave. 18 yrs. May 5. 



Common — ^Apr. 25 (1895) — May 27 (1917) ; 

 ave. 10 yrs. May 10. 



Departure — ^Aug. 24 (1905) — Sept. 10 (1904); 

 ave. II yrs. Sept. 2. 



112. Myiarchus crinitus Crested Flycatcher, "fly- 

 catcher," "great-crest," "snake bird." Common 

 summer resident. Nesting data: Berwyn, June 4, 

 1893, five eggs. 



Berwyn: 



Arrival — Apr. 17 (1913) — May 8 (1909); ave. 

 26 yrs. May i. 



Common — Apr. 19 (1894) — May 19 (1913); 

 ave. 22 yrs. May 9. 



Departure — Aug. 29 (1902) — Oct. 7 (1895- 

 1897) ; ave. 13 yrs. Sept. ig. 



113. Sayornis phcebe Phoebe, "beambird," 

 "bridgebird," "phoebebird," "pewee," "pewit." 



