Aquatic Insects 101 



the Continent it is still to be found in 

 numbers. 



Some species of the large family of 

 leaf-eating beetles (Chrysomelidce) have 

 larvae that are aquatic. The forms be- 

 longing to the genus Donacia frequent 

 the surface plants of ponds and streams 

 and lay their eggs on the leaves. The 

 resulting larvae, which are grub-like in 

 form, fall to the bottom and feed on 

 the roots of such plants as water- 

 lilies, broad-leaved pond weed, etc. 

 They obtain their air supply, by 

 means of two abdominal spines 

 furnished with spiracles, direct from 

 the plant roots. A cocoon is formed 

 on the roots and the pupa inside is 

 also able to tap the plant for its air 

 supply. 



Turning to the order Hemiptera that 

 contains many and very varied forms of 

 bugs, one finds such thoroughly aquatic 

 insects as the Boatman and the Water 



