BEETLES. 
23 
These legs are used as oars to paddle through the 
water or over it. 
Fig. 11.—Water-beetle ; antennae. 
This fine beetle is a good diver as well as an ex¬ 
cellent swimmer. The eggs are laid in delicately- 
woven egg-cases, which are fastened to the leaves 
of submerged plants. 
The larvae live in the water. They may be 
easily reared in aquaria, where 
they may be seen to swim and 
dive after their prey. 
The legs of many water-beetles 
are not conspicuous, especially 
when they are swimming, but 
when viewed from below as they 
swim over the surface of the wa- fig 12.—A Water- 
ter of an aquarium, it will be seen beetle, 
that they use their paddle-like feet with great 
rapidity. 
