OF EASTERN PENNSYLVANIA. 57 



tures insects upon the wing with nearly the skill 

 and address of the Wood Pewee. The smaller 

 diptera and hymenoptera contribute no mean 

 portion of its diet. 



Its flight is usually lofty, gracefully undulating, 

 rapid, and tolerably well sustained. 



During its friendly stay around our dwellings, 

 the only notes which we have heard it essay to 

 utter, may be happily expressed by the syllables 

 tsi-tsi-tsl pronounced very quickly, rather loudly 

 and with a gently rising intonation. It lacks the 

 ability to produce as powerful a note as the 

 species last described. Besides the above, it 

 possesses a succession of pleasing sounds which 

 we have frequently heard during the most in- 

 clement weather in mid-winter, and which have 

 been continued with scarce an intermission for 

 hours together. 



But little is known respecting its breeding- 

 habits, and its nest and eggs have never been 

 described. The presumption is that it builds a 

 pengile nest like its European congener, and lays 

 eggs finely sprinkled with buff-colored dots upon 

 a white ground, and nearly equal in size to those 

 of the Humming Bird. It has been inferred that 

 two broods are reared in a season, from the fact 

 that it spends so long a period in its summer 

 abode, and because full-fledged young were seen 

 by Mr. Nuttall as early as May. 



Family Paridae. Titmice or Chickadees. 



This family is distributed over the whole of 



