LIST OF PLATES. 



Facing 



Plate Page 

 I. Can or Cabinet Rack, used in the American 



Museum ______ 146 



II. The Cambridge Can, used in the American 



Museum ------ 148 



III. Method of Illustrating- Climatic or 



Geographic Variation in Birds in the 

 American Museum - - - - 150 



IV. Flamingo (Phœnicopterus ruber). Group in 



the American Museum of Natural History 152 



V. Group representing the Summer Bird-life 

 of the Irrigated Portions of the San 

 Joaquin Valley, California, in the Ameri- 

 can Museum of Natural History - - 154 

 VI. A Travelling School Collection of Birds - 156 

 VII. Hypotaenidia muelleri - 204 

 VIII. Pareudiastes pacificus - - - - 206 

 IX. Pintail-Mallard-Spotbill Trigen. S First 



Generation. Full Plumage - 240 



X. Pintail-Mallard-Spotbill Trigen. S First 



Generation. Eclipse Plumage - - 242 



XI. Pintail-Mallard-Spotbill Trigen. _? Third 



Generation. Full Plumage - 244 



XII. Comparison of Feathers from Hybrids and 



pure species ------ 260 



XIII. Distribution géographique de la Sterne de 



Dougall Sterna dougalU - 344 



XIV. Per dix per dix charrela, Pyrenees Françaises. 



Mâle après première mue - 502 



XV. Per dix per dix charrela, Pyrénées Françaises. 



Mâle et Femelle - - - 1 _ 504 



XVI. Carte Hypsométrique des Pyrénées. Mon- 

 trant la zone habitée par la Perdix perdix 

 charrela ------- 508 



XVII. Map I. Showing places of record in Eastern 



North America of Uria lomvia, 1890-1903 528 



XVIII. Map II. Migration of Uria lomvia in 1896 532 



