SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 146, NO. 4 



EVOLUTIONARY TRENDS IN THE 

 AVIAN GENUS CLAMATOR 



By 



HERBERT FRIEDMANN 



Director 



Los Angeles County Museum 



(Publication 4532) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



OCTOBER 30, 1964 



