Fic. 6.—Larva, grub, or boring stage of the 
roundheaded borer in mesquite. Enlarged. 
Fic. 7.—Section of mesquite with bark 
removed, showing larval mines and exit 
holes of the roundheaded borer. 
I'ig. 8.—Mesquite stick with 
bark removed, showing lar- 
val mines of the round- 
headed and _ flat-headed 
borers. 
