green is metallic black, soraetines with 37-9 1 low spots on the 

 wing covers. The eggs are laid in crevices of the bark and 

 upon hatching the grub "bores into the thicj: inner lasers of 

 the bark in which it excavates winding galleries filled wit;, 

 a coarse sawdust, the galleries being elliptical. like otli' 

 flatheads, the gallery at first barely distinguishable wiap):r 

 as the larvae grow. 'Then nearly lull -grown it enters the 

 cork bark where it pupates, emerging in June and July, leav- 

 ing an elliptical exit hole in the bark plates. 



This beetle weakens many mature firs, but often 

 takes two or three years to kill a trse, and also breeds 

 readily in windfalls and freshly cut timber. Slicing the 

 bark of dying trees in June will often reveal the pupae in 

 the bark places and peeling the bark 'will expose the gal- 

 leries, It is both secondary and primary in its attacks. 

 Other species of bark beetles often assist in killing the tr-- 



TBTROPIUH A3IETIS, FALL . 



(I^ir Hounihcad Borer,} 

 Hosts - Refi and. white fir. 



This beetle is entirely different from most of th ^ 

 insects killing trees and probably never breeds in pines. I 

 is called a roundhead borer because the larva or grub has t; 



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