PASSERINE BIRDS OF NEW YORK 343 



Streets, T. H. 



'83 A study of the immature plumage of the North American 

 Shrikes, to show their descent from a common progenitor 

 Ajner. Nat., XVII. 1883. PP- 3S9-391 



Studer, T. 



'73 Die Entwickkmg der Federn 

 Inaiig.-Diss., Bern. 1873 



Studer, T. 



'78 Beitrage zur Entwicklungsgeschichte der Feder 



Zeitsch. f. wiss. ZooL, XXX, Heft 3. 187S. pp. 421— 

 436, pis. XXV, XXVI , 



Sundevall, C. J. 



'43 Om foglarnes vingars 



Kon. Vetenskaps-Akad. Haiuil. 1843. pp. 303—384, pis. 

 I, II 



[German translation] ' ' Ueber die Fliigel der Vogel ' ' 

 Journ.f. Or/!., III. 1855. pp. 118-168, pi. I (folded) 

 [English translation] " On the wings of birds " 

 3is, 5th ser. IV. 1886. pp. 389-457, pis. X, XI 

 See also Isis. 1846. pp. 324-366 



Thompson, E. E. 



'94 Hybrid Pinicola eniccleator + Carpodacus purpureus 

 Auk, XI. 1894. pp. 1-3, col'd pi. I 



Townsend, C. H. 



'82 Remarkable plumage of the Orchard Oriole \Icterits spurius\ 

 Bull. Nittt. Orn. Club, VII. 1882. p. 181 



Trotter, S. 



'87 The significance of certain phases in the genus Helmi- 

 thophila 

 Auk, IV. 1887. pp. 307-310 



Tschusi (-Schmidhoffen), V. von* 



'66 Beitrage zur Farbenveranderung der Vogel in Weiss u. 

 Schwarz 



Verhandl. d. kais.-konigl. zool.-bot. Gescll. (Wien), XVI. 

 1866. pp. 223, 224 



Tyrer, R. * 



'77 Ueber die Vertarbung des Kreuzschnabels 

 Gefied. Welt. VI. 1877. pp. 209, 210 



