CHAP. II.] CLASSIFICATION AND \o.MK.V I. \ 



J i 



adopted in this 



15. Rhynchota 



1 6. Anoplura 



17. < Irthoptera 



18. Dermaptera 

 hi. Blal ...J 



20. Isoptera ... , 



21. Embiadas ... 1 



22. Thj sanopt ra 



23. Collembola 



24. Thysanura ... | 



25. Japj ... j 



26. Protura 



hi which iliL- ■_■ 

 in the Nim-.i Irder system. 



kh\ nchota 



I 



;- ( (rthoptera 



Neuropti ra 

 tnoptera 



ra ... 





with little 

 metamoiphi 

 no definite pupa! 



Of these groups, however, only those marked are oi sui 

 economic importani idered here and the adult inse< 1- o1 



these groups maj be separated by the following artificial key : — 



r Mouth-parts sucking ... •■• 2 



bititu 



. 1 Flies). 



Lepidoptera (Butterflies). 

 I lugs). 



Onlj one pair of wings 



2 «{ Two pairs „ 



1 No ■'• 

 'Wint;s covered with scales 



„ without scales 

 f Metamorphosis complete; hind- ) 



legs usually formed for jumping; ^ Siphonaptera (Fl 

 I not clinging to hairs of host. 

 Metamorphosis incomplete; hindo 

 legs not formed for jumping; '^Anoplura (Lice). 

 legs modified to cling to hairs ' 

 ( of host. 



I Two pairs of wings of approxi- 6 

 mately equal sue. 

 Two pairs of wings of unequ 



size. 

 Antennae longer than length of 7 



head. 

 Antennae shorter than length of Odonata (Dragon — flies). 



tin Ueuro hynchota, inwhicha 1 



pupal stage occurs. 



( Hale 1 1 



non-entomological n< 



