282 ARTHROPOD A [OH. 



Order 6. Thysanoptera. 



Jaws stabbing and sucking. Wings alike, small, fringed 

 with hairs. Metamorphosis with pupal stage and therefore 

 complete. 



Ex. Thrips. 



Order 7. Trichoptera. 



Jaws sucking only. Wings alike, covered with hairs. 

 Metamorphosis complete. Larvae aquatic, with tracheal gills, 

 and living in tubes. 



Ex. Phryganea. 



Order 8. Neuroptera. 



Jaws biting. Wings alike, membranous, with many 

 nervures. Metamorphosis complete. 



Ex. Siales, Myrmeleo, Hemerobius, Chrysopa. 



Order 9. Coleoptera. 



Jaws biting. Anterior wings hard and meeting each other 

 with a median, straight suture. Metamorphosis complete. 

 Ex. Coccinella, Melolontha. 



Order 10. Hymenoptera. 



Jaws biting and licking. Four membranous wings with 

 few nervures. Metamorphosis complete. 

 Ex. Formica, Apis, Vespa. 



Order 11. Hemiptera. 



Jaws piercing and sucking. Wings alike or different. 

 Metamorphosis incomplete. 



Ex. Acanthia, Cicada, Aphis. 



Order 12. Dipt era. 



Jaws piercing 'and sucking. Hind-wings reduced, front- 

 wings membranous. Metamorphosis complete. 

 Ex. Culex, Musca. 



Order 13. Siphonaptera. 



Jaws piercing and sucking, but differently constructed from 

 those of Diptera. Wings absent. Metamorphosis complete. 



Ex. Pulex. 

 Order 14. Lepidoptera. 



Jaws sucking. Four similar wings covered with scales. 

 Metamorphosis complete. 



Ex. Bombyx. 



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