The central insects, swimming on their backs, are examples of the Water 

 Boatmen, Notonecta glauca, the nearer one being attacked by the little Whirl - 

 wig Beetle. Gyrinus natator, while the other is gliding head foremost into the 

 extended jaws of the fierce larva of the Water Beetle, Hydrophilus caraboides' 

 On the rushes to the right is a Water Scorpion, Nepa cinerea. In the distance 

 are the linear forms of two Water Measurers, Hydrometra stagnorum, and below 

 them is a Water Bug of less slender growth, Velia currens. The figures above 

 represent the Water Scorpion and Water Boatman in flight. 



WATER-DEVILS. 



S we have before observed, nothing can have a 

 greater general tendency to augment our enjoy - 

 ment of the country than the study of Entomo- 

 logy; yet one day, as has happened occasionally 

 before, our little learning on the subject of 

 insects served to cast a shade, though it was but a passing one, 



