OF EASTERN PENNSYLVANIA. I I 5 



familiar species in New England, is according to 

 our experience, an occasional visitant in Eastern 

 Pennsylvania. In Southern and South-western 

 New Jersey it is more abundant. It makes its ap- 

 pearance at the earliest, from the i5th to the 2oth 

 of May, and lingers usually with us until the 5th 

 of June when it suddenly disappears. 



Its habits remind us of those of the Mniotilta 

 varia, in the facility with which it moves around 

 the trunks of trees in quest of insects; it is, besides, 

 an expert Flycatcher, capturing insects after the 

 fashion of the Wood Pewee. It is an active, rest- 

 less creature, seldom remaining any considerable 

 length of time in the same locality. 



The duration of their stay depends mainly upen 

 the abundance of insect-food. Though chiefly 

 denizens of low swampy woods and waste fields 

 overgrown with bushes and a few scattering 

 trees, during the greater part of their stay, they 

 sooner or later forsake these haunts for the habi- 

 tation of man, where in the adjoining orchards they 

 glean a ready subsistence. They now manifest 

 considerable tameness, and permit an easy ap- 

 proach. 



Their food consists of the larvae and pupae of 

 insects which they obtain from creviced bark, 

 besides, mature forms of different kinds. Among 

 the latter, may be mentioned Chrysomela ccerulei- 

 pennis, Cymindis viridipennis, Bostrichus pini, 

 Aphis mali, Apis mellifica, Muse a domestica, Taba- 

 nus lineola, Anisoptery-x vernata, and others com- 

 mon to the season, 



