INSECTS INFESTING THE GRAPE. 



207 



CHAPTER CXXIU. 



The Red-shouldered Grapevine Borer. 



[Sinoxyhn basillan'. — Say.) 



Order, Coleoptera ; Family, Ptinid.e. 



[Living in the canes of grapevines; a small yellowish six- 

 legged larva or grub, finally changing into a black beetle which 

 is usually marked with a red spot at the base of each wing- 

 cover.] 



This grub (Fig. IdoMi) lives in the canes of grapevines, boring 

 the wood beneath the bark, and also the heart-wood, in various 

 directions. It also lives in the trunks of apple, peach and 

 hickory trees. 



The pupa form {Fig. 195|6) is assumed in the burrow. 



The beetle (Fig. 195|f) measures about two and a half lines 

 in length, is of a black color, and there is usually a Large red- 

 dish spot at the base of each wing-cover ; the thorax is armed 

 with short spines in front, and the wing-cases are armed with 

 several small teeth at the apex or tip. 



Fis. 1954. — Red-shouL 



Fig. 1951^. 



dered Grapevine Borer, en- 

 larged ; a, the larva — color, 

 yellowish ; 6, the pupa — 

 color, yellowish ; c, t h e 

 beetle — color, black and 

 reddish. 



Remedies. — Use Nos. 26 

 and 27. 



