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INTRODUCTION TO ZOOLOGY 



The tarsus appears to be four-jointed only, but in some 

 cases another very small joint can be detected. 



The larvae of these insects feed on very various substances ; 



Fig. 197. — The Birch Weevil (Jihynchites bdulae). 

 a. The f Qll-grown insect, natural size ; 6, the birch leaf rolled by the weevil. 



one, a very short-snouted form, the Pea Weevil, lives in 

 ripening peas, and the larva on emerging makes the little 

 circular holes often noticed in them. Another, the Nut 



