SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME K2. NUMBER 



THE THORACIC MECHANISM OE A 



GRASSHOPPER, AND ITS 



ANTECEDENTS 



BY 



R. E. SNODGRASS 



Bureau of Entomology, 

 U. S. Department of Agriculture 



(Publication 3027) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER 31, 1929 



