INSECTS INFESTING THE APPLE TREE. 



69 



Fig. 26. — Flat-headed Apple-tree Borer — color, dark gray or 

 dull greenish. 



Fig. 26. 



Fig. 27. 



Fig. 28. 



Fig. 27. — Larva of Flat-headed Apjjle-tree Borer ; a, the 

 larva ; c, the underside of the head and forepart of the body — 

 color, white. 



Fig. 28. — Pupa of Flat-headed Apple-tree Borer — color, white. 



Remedy.— Use No. 37. 



CHAPTER XXIV. 



The Apple-twig- Borer. 



( BostrichvM bira u dutii.s. — Say. ) 

 Synonym — Amphiccrus ( Bostrirhiis) bicaudatus. 



Order, Coleopteka ; Family, Ptixid.e. 



[Living in grapevines, a small, whitish, nearly cylindrical, 

 grub, which is thickest anteriorly ; finally transforming into 

 a brown l^eetle which burrows in the twigs of the apple, pear 

 and peach trees.] 



The natural history of this insect has never been clearly 

 traced. Dr. Shinier states that he bred it from the larva found 

 burrowing out the central pith of a grapevine, while other 

 authors contend that it spends its larval stage in some forest 

 tree, and that the beetle forms a burrow into the grapevines, 

 apple-twigs (Fig. 29), etc., merely for the purpose of getting 



Fig. 29. 



a sheltered place in which to 

 pass the Winter. 



Fig. 29. — Twigs showing 

 burrows of apple-twig borer ; 

 c, the entrance ; d, the bur- 

 row cut open. 



