HORTICULTURAL DIVISION 



701 



PLATE No. 257. GALLERIES OF THE HICKORY BARK BEETLE IN BARK AND WOOD 



Photograph by United States Bureau of Entomology. 



PLATE No. 258. MINES OF THE TWO-LINED 



CHESTNUT AND OAK BORER 



(AGRILUS BILINEATUS) ON OAK WOOD 



Photograph by United States Bureau of 



Entomology. 



PLATE No. 259. GALLERIES AND GRUB OF 



THE ELM BORER (SAPERDA} 



Photograph by United States Bureau of 



Entomology. 



