AND THEIR INHABITANTS. 227 



One of the most active and interesting of the insects 

 found in the Lewes brooks is the Notonecta, which 

 is very common. It has an oblong, narrow body, 



WATER-SPIDER. 



NOTONECTA. 



convex above and flat below. Its head and eyes are 



conspicuously large. Its hind legs are very long and 



immensely powerful when used as oars, and enable it 



Q 2 



