LIST OF ILLUSTRATIONS. 



TEXT FIGURES. 



Page. 



Uolocentrus boirlcl 354 



Cluetodon trichroas 355 



Tetraodon ophryas 357 



Lii'oneca cowexa 445 



Livoneca eonvexa. Seventh leg 445 



Transfer of eggs in Siphostonia 463 



Eggs of the tritons in the eight-celled stage 481 



Pl/gldicrana peruviana 502 



Labldura mongolira 503 



Labidurodes magnifirus 505 



Anisolabis pluto 507 



Labia nigroflanda 508 



Chelisoches stratioticiis 509 



Ancistrogaster fair if era 510 



Opisthocosmia bogotensis 512 



Forftcuhi schwarzi 514 



(Joilia ectenes 518 



Zezera rnthbuni 518 



Fistularia starksi 520 



Collichthys fragilis 523 



Prosopodasys leurymiis 525 



Eleutris bulla 527 



Hypothetical wing type 577 



Modified hypothetical type 578 



Modified hypothetical type 578 



Modified hypothetical wing 579 



Modified hypothetical type 580 



]\Iodified hypothetical type 581 



Modified hypothetical type 581 



Typical hymenopterons wing 582 



Origin of the appendiculate cell 587 



Appendiculate cell 587 



Types of anal cells 593 



Reduction of the anal cells 595 



Typical hind wing witli the lacking veins indicated l)y dotted lines 597 



Wing trajectory 605 



Types of truss 607 



The front wing of Blennocampa and its trusses 608 



The front wing of Macroxyela and its trusses 610 



The base of the radial set-tor 617 



The switching of the base of the radial sector 619 



XIII 



