ZOOLOGY 



parts are used for biting. The largest representative of 

 this group is the Horned Corydalis (Fig. 11), whose larva 

 lives in streams and is called the dobson. The adult 

 is found among fallen leaves or on tree 

 trunks. 



The order Hemiptera includes certain 

 insects which resemble the Orthoptera in 



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FIG. 12. Hygrotrechus, water-strider. Nat. size. 

 Photo, by W. H. C. P. 



undergoing an incomplete metamorphosis; 

 i.e. in having larvae much like the adults 

 in form, and in having no quiet pupal 

 stage. They differ 

 from the Orthoptera 

 in possessing mouth- 

 parts adapted to 



FIG. 13. Reduvius, the 

 assassin bug. Black. 

 Nat. size. Photo, by 

 W.H. C. P. 



FIG. 11. Cory- 

 dalis, the dobson. 

 Two -thirds nat. 

 size. Photo, from 

 life by W.H.C.P. 



sucking. 



The True Bugs (Heteroptera) in- 

 clude a vast number of generally 

 small insects with very varied habits. 

 Some of them swim through the 

 water and are known as water boat- 

 men ; others skip over the surface of 

 the water and are known as water- 

 striders (Fig. 12). Others, like the 



