Order I. PASSE11ES. 



This edition of the Fauna follows its predecessor in beginning 

 with the Passeres. The classification and further division of this 

 Group presents more difficulties than all the rest put together. 



Briefly, the Passeres may be defined as follows : Skull 

 aegithognathous (vomer truncated in front). Sternum with a 

 large spina externa, and no spina interim. Clavicle with expanded 

 free ends. Hypotarsus complex. 



Wing lacking the biceps and expansor secoudariorum muscles. 

 Thigh muscles having no accessory femoroeaudal or abiens 

 muscles present. 



Only one carotid the left is present. Creca are vestigial. 

 Oil-gland nude. Wing eutaxic. 



The arrangement of the Sub-Orders adopted here is that of 

 Gadow (Bronn's Thier-reichs, Bd. vi., ii. Syst. Theil, 1893). 

 But the subdivision of the Anisomyodi is based on that of 

 Pycraft (P. Z. S. 1905-0-7), his Oligomyodi answering in part to 

 that of Huxley (P. Z. S. 1867). 



SUB-ORDER. 



Anisomyodi 



GROUP. 



Clamatorcs 



Oligomyodi 



FAMILY. 



IEurylasmidie. 

 Cotingidae. 

 I Philepittidffi. 

 1 Pipridae. 



I Tyrannidaa. 

 J Pittidaj. 

 j Phytotomidaa. 

 (_ Oxyrhampida\ 



(TormicariidcB. 



Dendrocolaptidaj. 

 Furnariidaa 



SUB-FAMILY. 



Diacroroyodi... 



Tracheophonae... 



Conopophagidaj . 



Fiirnariiiue. 



Sclerurinae. 



Synallaxina?. 



Margarornithina-. 



Phylidorhinai. 



Conopophagina;. 



Pteroptocliina-. 



Hvlactina;. 



i^Xenicidas. 



\ Menurid;v. 

 I Oscines. 



Having regard to the fact that the main divisions of the 

 Passeres are based on the structure of the syrinx, a brief summarv 



