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TEXT-BOOK OF ZOOLOGY 



"soldiers." It is chiefly met with on lime-trees, and in the absence of 

 hind-wings is incapable of flight. 



The Berry Bug (Carpocnris bavcariim) is about $ inch long, brown 

 in colour, and imparts to cherries or other berries at which it sucks the 

 peculiar repulsive, bug-like taste. 



The water bugs are active creatures, of decidedly predaceous habits, 

 and most of them capable of inflicting irritating stings. One of them 

 has the peculiar habit of swimming on its back, and is therefore called 

 the Boat Fly or Water Boatman (Xotouecta glaum). We accordingly 

 rind that its back is light-coloured, while the ventral surface is dark- 

 coloured, exactly the opposite of what we find in other aquatic animals 



Berry Bur; on Raspberry Bush. 



Above it, an insect with the wings of the left side expanded. H., Pronotum ; S., scutellum ; 

 D., coriaceous portion of fore-wing. 



(frog, carp, etc.). The body is shaped like a small boat, the back being 

 raised into a kind of keel, while the hind-legs are very long, and trans- 

 formed into swimming-legs or oars (see water beetle). 



In another species the fore-legs have the form of prehensile organs 

 (see praying mantis, p. 396), giving the predaceous creature almost the 

 appearance of a Hcnypimi (which see), whence it also obtains the name 

 Water Scorpion (Ncpa vinerea). 



On the surface of the water elongated insects may often be seen 

 hopping or gliding along like skaters. These are the Water- Measurers 



