72 CLASSIFICATION. 



DESCEIPTIOX OF HEMIPTERA. 



1st. — 'Whiff structure : Presents quite a variety 

 of modiiications in this sub-order ; among some 

 members of it, the wings are altogether Avaut- 

 ini? — some have four membranous wincfs as 

 organs of flight, while others have the first 

 pair modified as wing-covers, cither wholly 

 horny or crustaceous, or partly thus and partly 

 membranous. 



These differences have led to two sub- 

 divisions of the Hemiptera ; into ffemiptera- 

 homoptera^ in which the wings are/bz/r mem- 

 branous organs of flight, and Ilemiptera- 

 heteroptera^ in which are found the various 

 other modifications of wing structure. 



2d. — Mottth parts : For sucking and piercing, 

 no jaws ; instead, a beak or rostrum consist- 

 ing of three lancets protected by a case which, 

 when at rest, is bent under and along the 

 body. 



3d. — Transformations — incomplete. Larva and 

 pupa like the imago, but without wings, and 

 smaller in size. 



H 



FAMILIES OF HEMIPTERA. 



Aphidse (plant lice family). 



Coccidae (bark lice family). 



Cicadellina (leaf-hoppers). 



Fulgoridse (lantern-fly family). 



Cicadarise (cicada, or 17 year locust family). 



Notonectida? (water boatman family). 



Nepidae — ploteres (water-bug). 



