SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 80, NUMBER 1 



MORPHOLOGY AND MECHANISM OF THE 

 INSECT THORAX 



BY 



R. E. SNODGRASS 

 Bureau of Entomology 



(Publication 2915) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JUNE 25, 1927 



