1898.] NATURAL SCIENCES OF PHILADELPHIA. 81 



24. Dryobates pubescens. Downy Woodpecker. 



Abundant and generally distributed, both in the woodland and 

 in the open country. 



[25. Ceophloeus pileatus. Pileated Woodpecker. 



Personally I have never observed this species during the breed- 

 ing season, but as several specimens have been taken during the 

 early part of August, it doubtless breeds sparingly]. 



26. Melanerpes erythrocephalus. Red-headed Woodpecker. 



Rare. A pair was observed at Dundaff, June, 1895, and a single 

 bird near Montrose in June, 1896. 



27. Colaptes auratus. Flicker. 

 Abundant everywhere. 



28. Antrostomus vociferus. Whip-poor-will. 



Very rare, having been only once or twice noted in low, secluded 

 spots. 



29. Chordeiles virginianus. Night Hawk. 



Very common, collecting in large flocks during August. 



30. Chaetura pelagica. Chimney Swift. 



Abundant, breeding throughout the county. It has, however, 

 adapted itself to the ways of civilization and has never been ob- 

 served nesting in hollow trees. 



31. Trochilus colubris. Ruby-throated Humming-bird. 



Common, both about houses and in the deep woods. 



32. Tyrannus tyrannus. Kingbird. 

 Abundant and generally distributed. 



33. Myiarchus crinitus. Great-crested Flycatcher. 



Tolerably common throughout the county. 



34. Sayornis phoebe. Phoebe. 



Abundant everywhere in the open country. 



35. Contopus virens. Wood Pewee. 



Fully as abundant as the preceding species, but confined to or- 

 chards and woodlands. 



36. Empidonax minimus. Least Flycatcher. 



Very common and universally distributed during the breeding 



season. 



