123. Detmers — Reptile 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 Sonef— Ibis, 1899, p. 9. 



132. Gurnev— Ibis, 1899, p. 19. 



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



134. Mnrphv, R. C. — Personal communication. 



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



136. La Nature, Jnlv 6, 1912. 



137. Beetz and Townsand— Ank, 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 Phvsioloo:v, 1915. 



149. Bates— AVilson 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 



