0^X1 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 82, NUMBER 2 



THE THORACIC MECHANISM OF 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 



