OF EASTERN PENNSYLVANIA. 173 



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 aftord 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 Rkyrichcenus pini, 

 Bostrichus piui, CratouycJnis cinereus, C. pertinax, 

 Platynus citpripcnnis, Harpalus compai\ Donacia 

 confluenta, Chrysomela ctcrulcipcnnis, among cole- 

 optera; Formica sanguined, F. subterranea, Apis 

 mcllifica, Selandria rosee, S. viti, Megachile centitn- 

 cularis, several Halicti and Andrence, among 

 hymenoptera; Musca domestica, Syrphus obscurus, 

 Culex taniorhynchuS) Stomoxys calcitrans, Tabamis 

 lineola\ Tipula ferruginea^ among diptera; Aphis 

 roscc, A. mali, and other Aphidtf, the small spiders 

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

 T&gcnaria- domestica, Epeira diadcma, and mature 

 forms of the lepidoptera Harrisina Americana, 

 Lithosia miniata, Spilosoma Virginica, PentJiina, 

 pomonella, Orgya leucostigma, many of the Noc- 

 tuidce, Tortricid&i Lyccenid&\ and Tineidce^ with the 



