TABLE OF CONTENTS Xlll 



Order Diptera page 504 



[Suborder Orthorrhapha] 



[Suborder Cyclorrhapha] 

 Order Aphaniptera 512 



Order Strepsiptera 514 



CHAPTER XV 



Subphylum Arachnida 515 



Class Scorpionidea 520 



Class Eurypterida . 524 



Class Xiphosura 526 



Class Araneida 530 



Class Acarina 533 



[Order Notostigmata] 



[Order Cryptostigmata] 



[Order Prostigmata] 



[Order Stomatostigmata] 



[Order Heterostigmata] 



[Order Parastigmata] 



[Order Mesostigmata] 



[Order Metastigmata] 

 Class Phalangida 537 



[Class Palpigradi] 

 [Class Pedipalpi] 

 [Class Pseudoscorpionidea] 

 [Class Solifugae] 



Class Pantopoda (Pycnogonida) 538 



Incertae sedis: 



Suborder Diotocardia (Aspidobranchiata) 563 (564)^ 

 Tribe Rhipidoglossa 563 



Tribe Docoglossa 563 



^ References in brackets are to the pages on which examples are described. 



