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MISC. PUBLICATION 273, U. S. DEPT. OF AGRICULTURE 



damage to a low point. In wood that has become mfested after being 

 put into place, the grubs usually can be reached and killed by liberal 

 applications of crude orthodichlorobenzene or kerosene. 



The sculptured pine borer {Chalcophora anguJicoUis Lee.) (fig. 

 73) is the largest of the western species of fiatheaded borers and the 

 only western representative of this genus. The adults are over 1 

 inch long and dark brown to black, with an iridescent bronze luster, 

 especially on the under side. The upper surface is marked with ir- 

 regularly sculptured areas. Many a woodsman has been startled on a 

 warm summer day to have one of these large beetles suddenly take 

 flight with the noise of a small airplane from its quiet resting place 

 on a nearby tree trunk. The larvae feed in the wood of dead pines 

 and firs throughout the Western States. 



Figure 73. — Fiatheaded wood borers : A, ChalcoiJlwi a angulicolli.'s, larva and adult, X 1.5 

 (drawing by Edmonston) ; B^ tbe same, natural size; C, Dicerca tenebrosa, natural 

 size. 



The golden buprestid {Buprestis auruJenta L.) is one of the most 

 destructive species in this group. The adults are beautifully colored 

 beetles one-half to three-fourths of an inch in length, with a flattened 

 oval body and an iridescent green or bluish color, with all margins 

 bordered with copper. They are particularly attracted to pitchy 

 Avood and lay their eggs on fire scars or the exposed pitchy wood of 

 pines, firs, and other conifers. Flooring and woodwork of Douglas 

 fir that is not heavily covered with paint or varnish is sometimes re- 

 peatedly attacked until the interior is completely riddled and 

 destroyed. If the wood is very dry, it takes several years for the 

 larvae to complete their development. 



There are about 12 other species in this genus of highly colored 

 beetles that do similar damage to the wood of western forest trees. 

 Some of the more common are as follows : 



