Bui. 437, U. S. Dept. of Agriculture. 



Plate VIII. 



Fig. 1. Bark from dying yellow pine (Pinus 

 ponderosa) mined by larvse of Melanophila 

 drummondi. xK (Photograph by H. E. 

 Burke.) (Original.) 



Fig. 2.— Wood from scar on living red fir {Abies 

 viagniflca) mined by larvne of Trachykele 

 nimbosa. (Photograph by H. E. Burke.) 

 (Original.) 



Fig. 3. — Stems from living bush of manzanita 

 {Arctostaphplos vhcida) showing galls made 

 by mines of larvae of .AgrrtYus sp. Xi. (Pho- 

 tograph by H. E. Burke.) (Original.) 



Fig. 4. — Leaves of the live oak ( Quercus tvisli- 

 seni) partly eaten by adults of Agrilus angeli- 

 cus. Xj. (Photograph by H. E. Burke.) 

 (Original.) 



Fig. 5. — Cones of the knobeone pine (Pinus 

 attenuata) mined by the larvae of Chrysaphana 

 piacida. XV. (Photograph bv H. E. Burke.) 

 (Original.) 



Fig. 6. — Manzanita (Arctostaphylosviscida) bush 

 partly killed by mines of larva; of Agrilus 

 sp. XA- (Photograph by H. E. Biirke.) 

 (Original.) 



Work of Flat-Headed Borers. 



