CONTENTS 



PAGE 



Historical review 642 



Biology 644 



The early stages 651 



The adult lice 653 



The male 653 



The female 654 



The integument and body wall 654 



The respiratory system 656 



The muscular system 661 



The vascular system 666 



The nervous system 668 



The stomodaeum, mouth parts, and salivary glands 671 



The haustellum 675 



The buccal plate 675 



The pumping pharynx 676 



The pumping pharyngeal tube 676 



The pharynx 676 



The esophagus 677 



The " mandibles " of Enderlein 677 



Musculature of the stomodaeum 678 



The mouth parts 681 



The sheath 681 



The piercers and the salivary duct 682 



Musculature of the mouth parts 683 



The salivary glands 687 



The alimentary canal and its appendages 690 



Feeding and digestion 692 



The fat body 697 



The reproductive organs 699 



Male 699 



Female 706 



Technique 714 



Summary 716 



Acknowledgments 717 



Bibliography 719 



637 



