rNSECT.S INFESTING THE APPLE TREE. 



65 



CHAPTER XXII. 



The Round-headed Apple-tree Borer. 



( Saperda Candida — Fabricius.) 



Synonym. — Saperda bivittata — Say. 



Order, Coleoptera ; Family, Cerambycid.e. 



[The measurenients of insects in this work are g-iven in inches and lines. The above cut rep- 

 resents one inch divided into lines and fractions tifiereof.] 



[Boring into the trunks of apple, pear, . (juince, and sim- 

 ilar trees, a nearly cylindrical, yellowish-white, footless grub, 

 which is finally changed into a beetle of a brownish color, hav- 

 ing two white stripes on its back]. 



The greater number of injurious insects live exposed upon 

 the plants which they attack ; l)ut there are several kinds which 

 live concealed from view in the stems or branches of various 

 kinds of plants, shrubs, and trees, and thus hidden from view, 

 they carr}^ on their silent work of destruction. Prominent 

 among this latter class is the round-headed apple-tree borer, 

 which is found over the greater part of the United States. 



Fit?. 25. 



[Fig. 25. — Round-headed Apple-tree Borer; <(, the larva — 

 color, yellowish-white ; 6, the pupa — color, yellowish-white ; c, 

 the beetle — colors, brown and white.] 



The beetles, or perfect insect (Fig. 25c) first make their 

 appearance a few weeks after the apple tree has put forth its 



