INTRODtTCTION. IX 



Monograph of the ' Aves Struthiones,' represented in that museum 

 by 37 specimens, belonging to 14 species. In 1877 J. de Rosenthal 

 and J. E. Harting published a volume on ' Ostriches and Ostrich 

 Farming,' which contains a useful resume of our knowledge of 

 Struthious Birds. 



In working out these three groups of birds I have found that of 

 the Anseres most laborious, on account of the exceedingly great 

 number of references and of the many phases of plumage through 

 which these birds pass, aud which are not always easy to understand. 

 The study of the Tinamous is very difficult, especially as the limits 

 of variation seem wide and the species often ill-defined ; a very 

 extensive series of specimens is necessary in order to arrive at any 

 definite conclusion. Fortunately I have been helped by many 

 friends, either with suggestions or with the loan of rare and typical 

 specimens ; and I desire to express my thanks particularly to 

 Mr. Salvin, Mr. Sclater, Mr. Seebohm, the Hon. W. llothschild, 

 Mr. Hartert, Prof. A. Xewton. Dr. Oustalet, Dr. Dubois, 

 Dr. Reichenow, Graf von Berlepsch, Cauon Tristram, Dr. Forbes, 

 Mr. Ridgway, Mr. Allen, Dr. Hartlaub, Prof. Barboza du Socage, 

 Dr. Schauinsland, Dr. Stolzmann, and Prof. P. Godot. 



T. SALVADORI. 



Turin, Zoological Musetiin, 

 August, 1S95. 



