SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 103. NUMBER 7 



THE MUSCULATURE OF THE LABRUM, 



LABIUM, AND PHARYNGEAL REGION 



OF ADULT AND IMMATURE 



COLEOPTERA 



(With 24 Plates) 



BY 

 CARL K ESTER DORSEY 



Bureau of Entomology and Plant Quarantine 

 U. S. Department of Agriculture 



(Publication 3697) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JANUARY 20, 1943 



