SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 142. NUMBER 1 



FACTS AND THEORIES CONCERNING 

 THE INSECT HEAD 



By 

 R. E. SNODGRASS 



Honorary Research Associate 

 Smithsonian Institution 



(Publication 4427) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



NOVEMBER 4, 1960 



