98 



Family Micropodidse— The Swifts. 



Only one species occurs. 



197. Cliceturaj^elfff/ica (Ljy^^.). Chimney Swift. 



Breeding Range — Yircrinia to Canaihi. westward to the Plains. 

 Winter Distribution — South of the U. 8. 



Abundant summer resident every where. April 15-October 10. 



Family Trochilidae — The Hummingbirds. 



Only one species occurs in euj^tern North America. 



198. Trochiliis coluhrls Linn. Ruby- throated Hum- 

 mingbird. 



Breeding Range — Eastern U. iS.. northward to Canada. 



Winter Distribution — Cuba, eastern Mexico and Central America. 



Common summer resident, much more abundant in some localities 

 than otiiers. May 12-September 25. 



Family Tyrannidse. — The Tyrant Fly- 

 catchers. 



Of the Flycatchers, nine species occur in eastern Pennsylvania 

 ami New Jersey. The Pewee, Wood Pewee, Kingbird, Crested and 

 Acadian Flycatchers are common breeders. The last is restricted 

 to the southern counties, and is replaced farther north by the Least 

 Flycatcher, which is a transient in the vicinity of Phihidi-lphia. 

 The Yellow-bellied Flycatcher is a migrant Si)ecies rarer than any 

 of the preceding, wliile the Traill's and Olive-sided Flycatchers are 

 of still less frecpient occurrence.* 



* Three western and southern species, the Fork-tailed, Scissor-tailed and 

 Arkansas Flycatchers, have also occurred as mere accidental stragglers within 

 our district. See below. 



