CASSINIA 



An Annual Devoted to the Ornithology of 

 Pennsylvania and New Jersey. 



CONTENTS 1901. 



PAGE 



John Cassin (portrait) Wither Stone 1 



Observations on the Summer Birds of Parts of 



Clinton and Potter Counties, Pa. Francis R. Cope, Jr. 8 



Photographing a Nighthawk's Nest and 



Young, (plate) William h- Baily 22 



A Walk to the Paoli Pine-Barrens William J. Serrill 24 



The Yellow -winged Sparrow in Pennsylvania Samuel Wright 28 



Trespassing of the Rose -breasted Grosbeak 



in the Carolinian Fauna William B. Evans 32 



Nesting of the Mockingbird in Eastern 



Pennsylvania W. E. Roberts and W. E. 



A Spring Migration Record for 1893-1900 Frank 



The Spring Migration of 1901 



Birds that Struck the City Hall Tower During 1901. 

 Abstract of the Proceedings of the Delaware Valley 



Ornithological Club 1901 

 Bird Club Notes 



List of Officers and Members of the Del. Valley Ornith. 

 Index 



PUBLICATIONS OF THE D. V. O. C. 



The Birds of Eastern Pennsylvania and New Jersey, by Witmer 

 Stone, pp. 176 with two maps and portrait of Alex. 

 Wilson One Dollar. (Post paid $1.12) 



Abstract of Proceedings, Full Set Nos. I. -IV. ( 1890-1900) pp. 98, Fiftj' cents 



Cassinia, published annually beginning with 1901 ; comprising 

 papers relating to the Ornithology of Pemisjdvania 

 and New Jersey and an abstract of the proceedings of 

 the Club. Edited by Witmer Stone. Subscription 

 price. Fifty cents 



Address^^ T)(>hwT^re' Valley Ornithological Club, 



Care AcadeHiy of Natural Sciences, 



Logan Square, Philadelphia. 



