54 



CLASSIFICATION A^D NOJtE.VCLATUllE. 



The first pair of wings are thickened^ fit tig-litly to the body and 

 make a sheath for the large folded lower wing-s. Biting mouth-parts. 



A metamorphosis, the larva being an 

 active grub. 



These are easy to recognise, the hard 

 upper wings meeting in a straight line 

 over the back. 



Lepidoptera {lejns = a scale ; pfera = 

 wings). Butterflies and moths. 



The wings are larg-e, clothed in fine 

 scales. 



The imago has a suctorial proboscis. 



Fia. 78. 

 Lepidopterous Insecf. 



A metamorphosis, the larva 

 being a caterpillar with biting 

 mouth-parts. 



Diptera {di = two; ptera 

 swings). Flies, mosquitoes, 

 etc. 



riG. 80. 



Semipterous Insect. 



Fig. 79. 

 Dipterous Insect } Larva and Pupa belotv. 



One pair of wings only. Suctorial 

 mouth-parts. A metamorphosis, the larva 

 being, as a rule, a legless maggot. 



Ilemiptera (^<^y;^^ = half ; ptera ^ 

 wings). The bugs. 



The basal half of the upper wings often 

 thickened. Sucking mouth-parts. No 

 metamorphosis. 



Distinguished from beetles most readily 

 by the fact that the wings do not meet in 

 a straight line, but overlap. 



