THE AMERICAN NATURALIST [Vol. XLVIII 



Stone, W. 



1912. The Phylogenetic Value of Color Characters in Birds. Jour. Acad. 



Nat. Set. Phila., Ser. 2, Vol. 15, pp. 311-319, pi. 27. 



1904. The Metallic Colors of Feathers from the Sides of the Neck of the 



Domestic Pigeon. Mark Anniv. Vol., New York, pp. 263-277, 

 pi. 20. 



1905. Causes of Blue and Green in Feathers. Biol. Bull, Vol. 8, pp. 



1913. A Study of a Collection of Geese of the Branta canadensis Group 



from the San Joaquin Valley, California. Univ. of Calif. Publ., 

 Zool., Vol. 12, pp. 1-24, pi. 1-2, 8 text -figs. 

 Sweet, D. A. 



1907. Notes from Avon [Albinistic j uncos from Maine]. Jour. Maine 



Thayer, G., and A. H. 



1909. Concealing Coloration in the Animal Kingdom. New York. 

 Townsend, C. H. 



1883. Some Albinos in the Museum of the Philadelphia Academy. Bull. 

 Nuttall Orn. Club, Vol. 8, p. 126. 

 Townsend, C. W. 



1908. On the Status of Brewster's Warbler (Eelminthophila 



bronchialis) . Auk, Vol. 25, pp. 65-68. 

 Ward, H. L. 



1908. A Rapid Melanistic and Subsequent Partial Albinistic Change in 

 a Caged Robin. Bull. Wisconsin Nat. Hist. Soc, Vol. 6, pp. 



Worthen, C. K. 



1897. Albinism, Melanism and Hybridism. Osprey, Vol. 1, pp. 23-24. 



