54 



CLASSIFICATION AN T D 



The first pair of wings are thickened, fit tightly to the body and 

 make a sheath for the large folded lower wings. 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 (lepis = a scale ; ptera = 

 wings) . Butterflies and moths. 



The wings are large, clothed in fine 

 scales. 



The imago has a suctorial proboscis. 



FIG. 78. 

 Lepidopterous Insect. 



A metamorphosis, the larva 

 being a caterpillar with biting 

 mouth-parts. 



Diptera (^'=two; ptera 

 = wings). Flies, mosquitoes, 

 etc, 



TIG. 80. 



Insect. 



FIG. 79. 

 Dipterous Insect ; Larva and Pupa below. 



One pair of wings only. Suctorial 

 mouth-parts. A metamorphosis, the larva 

 being, as a rule, a legless maggot. 



Hemiptera (7^m'=half j 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. 



