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



Plate VIII. 



Fig. 1. Bark from dying yellow pine (Pinus 

 ponderosa) mined by larvae of Melanophila 

 drummondi. X?. (Photograph by H. E. 

 Burke.) (Original.) 



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

 magnified) mined by larvae of Traehykele 

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

 (Original.) 



Fig. 3.— Stems from living bush of manzanita 

 (Arctostaphylos viscida) showing galls made 

 by mines oi' larvae of Agrilus sp. x?. (Pho- 

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



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

 zeni) partly eaten by adults of Agrilus anqeli- 

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

 (Original.) 



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

 attenuata) mined by the larvae of Oirysophana 

 placida. Xh (Photograph by H. E. Burke.) 

 (Original.) ' 



Fig. 6.— Manzanita (Arctostaphylosriseida) bush 

 partly killed by mines of larvae of Agrilus 

 sp- X?V (Photograph by H. E. Burke.) 

 (Original.) 



Work of Flat-Headed Borers. 



