BRITISH INSECTS 



for which they are required. It measures about i| 

 inches in length, and about | an inch across. It has 

 two sharp spines near the hind legs which are of obvious 



Fig. 11. 



Fig. 12. 



Fig. 13. 



Fig. 11, Larva. Fig. 12, Pupa. Fig. 13, Image of Great 

 Brown Water Beetle. 



service for defence, and also discharges an evil-smelling 

 fluid when irritated. When the larva is ready to pupate, 

 42 



