THE MUSCULATURE OF THE LABRUM, LABIUM, AND 



PHARYNGEAL REGION OF ADULT AND 



IMMATURE COLEOPTERA 



By carl KESTER DORSEY 

 Bureau of Entomology and Plant Quarantine, U. S. Department of Agriculture 



(With 24 Plates) 



CONTENTS 



PAGE 



Introduction 2 



I. General discussion of the musculature 4 



II. Muscle arrangement in Coleoptera 9 



III. Caraboidea 10 



Carabidae 10 



Cicindelidae , 10 



Dytiscidae 10 



IV. Gyrinoidea 11 



Gyrinidae 11 



V. Staphylinoidea 12 



Silphidae 12 



Staphylinidae 12 



VI. Hydrophiloidea 13 



Hydrophilidae 13 



VII. Cucujoidea 14 



Tenebrionidae 14 



Coccinellidae 14 



Synchroidae 14 



VIII. Byrrhoidea 15 



Byrrhidae 15 



IX. Dascilloidea 16 



Nosodendridae 16 



Heteroceridae 16 



X. Dryopoidea 16 



Dryopidae 16 



Ptilodactylidae 17 



XL Cantharoidea 17 



Cantharidae 17 



Lycidae 17 



Lampyridae 18 



XIL Elateroidea 18 



Elateridae 18 



Buprestidae 18 



Cebrionidae 19 



SMITHSONIAN MISCELLANEOUS COLLECTIONS, VOL. 103, NO. 7 



