OF EASTERN PENNSYLVANIA. I 73 



able agility, assuming a variety of attitudes; min- 

 gles among the leaves, and anon darts forward 

 with unerring precision, seizing an unfortunate 

 insect which has unwittingly strayed across its line 

 of vision. 



In the procurement of food it is as often found 

 upon the uppermost branches of tall trees, as upon 

 the nethermost, or small bushes. It is not strictly 

 arboreal, having been found by us feeding upon 

 fallow ground. At first it destroys immense num- 

 bers of beetles which afford it a rich nourishment; 

 but its appetite soon cloys of such food, and dip- 

 tera, aphides, and lepidoptera in their larval and 

 perfect stages, constitute' a happy exchange. We 

 have detected the remains of Rkynchcenus pini, 

 Bostrichus pini, Ci^atonychus cinereus, C. pertinax, 

 Platynus cupripennis, Harpalus compar, Donacia 

 confiuenta, Chrysoniela cceruleipennis, among cole- 

 optera; Formica sanguinea, F. subterranea. Apis 

 mellifica, Selandria roses, S. viti, Megackile centun- 

 cularis, several Halicti and AndreiKB, among 

 hymenoptera; Musca domesdca, Syrphus obsciirus, 

 Culex tceniorhynckus, Stomoxys calcitrans, Tabanus 

 lineola, Tipula ferrtiginea, a.mong diptera; Aphis 

 rosce, A. mali, and other Aphides, the small spiders 

 that infest the bark, leaves, and flowers of plants ; 

 Tagenaria domesdca, Epeira diadema, and mature 

 forms of the lepidoptera Harrisina Americana, 

 Lithosia miniata, Spilosoma Virginica, Pen-thinci, 

 pomonella, Orgya leucosdgma, many of the Noct- 

 tuidcs, Tortricid<s, Lyccenidce, and Tineidce, with the 



