123. Detmers Keptile Book. 



124. Detmers Zoologica, Vol. I, p. 237. 



125. Detmers Bull. N. Y. Zool. Soc., July, 1904, p. 158. 



126. Hawes and Swinnerton Trans. Zool. Soc., London, 

 Feb., 1901. 



127. Jewett Condor, March, 1916, p. 75. 



128. Newberry Condor, March, 1916, p. 65. 



129. Skinner Condor, March, 1916, p. 64. 



130. Whitaker Ibis, 1899, p. 502. 



131. Le Souef Ibis, 1899, p. 9. 



132. Gurney Ibis, 1899, p. 19. 



133. Oustalet La Nature, 1900, p. 378. 



134. Murphy, R. C. Personal communication. 



135. Beebe Bull. N. Y. Zool. Soc.. Jan., 1906, p. 258. 



136. La Nature, July 6, 1912. 



137. Beetz and Townsand Auk, July, 1916, p. 287. 



138. Pycraft^-History of Birds, 1914. 



139. Mills Animal Physiology, p. 402. 



140. Curtis Maine Agric. Exp. Station, Bull. No. 228, 

 June, 1914. 



141. Pickerell, Arizona Ostrich Farm Personal communi- 

 cation. 



142. Bellchambers So. Australian Ornithologist, April, 

 1916 (vide Auk, July, 1916). 



143. Menegaux Revue Francais d'Ornith., Oct., 1915 (vide 

 Auk, Jan., 1916). 



144. Internat. Encyclop., Vol. VIII, p. 660. 



145. Ridgway Man. No. Am. Birds, 4th Edition. 



146. Macdonald Auk, Oct., 1916, p. 435. 



147. Smith, R. W. Physiology of Domestic Animals. 



148. Howell Text Book of Physiology, 1915. 



149. Bates Wilson Bull., No. 96, p. 151. 



150. Gadow Bonn's Tier. Reich, Vogel, VI. 4, p. 698. 



151. International Encyclop., Vol. I, p. 518. 



152. Phillips, Clyde and Bergtold, W. H. Personal ob- 

 servation. 



153. Morgan So. Australian Ornithologist, July, 1916. 



154. Beebe Bull. N. Y. Zool. Soc., Oct., 1908, p. 459. 



155. Encyclop. Britt,, Edit. IX, Vol. XX, p. 411. 



156. Pombery Schafer's Physiology, Vol. I, p. 785. 



157. Fuertes, Louis Personal communication. 



158. Mousley Auk, July, 1916, p. 281. 



159. Beebe Bull. N. Y. Zool. Soc., Jan., 1908, p. 397. 



160. Pickerell U. S. Dept, Agric. Yearbook, 1905, p. 401. 



161. Hatch Birds of Minnesota, ,p. 73. 



162. Heinroth Zool. Beobachter, Vol. XLIX, No. 1, p. 14. 



163. Blaauw Avicult. Mag., Vol. VII, No. X, 1916. 



164. Simpson Trans. Royal Soc. Edinburgh, Vol. XL VII, 

 part 1, No. 5, p. 607. 



108 



