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 

 Amer. Nat., XVII. 1883. pp. 389-391 



Studer, T. 



'73 Die Entwicklung der Federn 

 Inaug.-Diss., Bern. 1873 



Studer, T. 



'78 Beitrage zur Entwicklungsgeschichte der Feder 



Zeitsch. f. wiss. Zool., XXX, Heft 3. 1878. pp. 421 

 436, pis. XXV, XXVI 



Sundevall, C. J. 



'43 Om foglarnes vingars 



Kon. Vetenskaps-Akad. HandL 1843. pp. 303384, pis. 

 I, II 



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

 Journ. f. Orn., III. 1855. PP- 118-168, pi. I (folded) 

 [English translation] " On the wings of birds " 

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

 See also Isis. 1846. pp. 324-366 



Thompson, E. E. 



'94 Hybrid Pinicola enucleator -f- Carpodacus purpureus 

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



Townsend, C. H. 



'82 Remarkable plumage of the Orchard Oriole [Icterus spurius\ 

 Bull. Nutt. 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. Gesell. (Wien), XVI. 

 1866. pp. 223, 224 



Tyrer, R. * 



'77 Ueber die Vertarbung des Kreuzschnabels 

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



