vertical egg galleries with long larval galleries branching 

 off fmm the main gallery. The egg galleries are compara- 

 tively short in relation to the larval galleries, and are 

 plainly marked in the inner layers of the bark and on the 

 surface of the eap'vood. The transformation takes place in 

 the outer portion of the inner hark which is usually very 

 thick in Douglas firs. The beetle is usually one brooded, 

 passing the winter months in all stages of development , and 

 emerging in the first continuous hot weather in the spring. 

 It is the only Dendrootonus in California attacking Douglas 

 fir and has not so far become epidemic except in few places, 

 notably the Plunas Torest. The Douglas fir is not a true 

 fir but is so classed here on account of its common name 

 "Douglas Fir". Douglas firs aitf firs are comuonly killed 

 by certain fungi* follow-so 1 , up by the inject attacks. 



MnLAKOPHILA 3FUMMOITDI , 7.1P.3Y. 



(The Fir Flathead Borer.) 

 Hosts - Douglas, red and white fir. 



This flathead beetle is generally slightly smaller 

 than the pine flather.d (Melanophila gentilis) and instead of 



"Forest Tree Diseases Common in California and Nevada". B' 

 E. P. Mean-sake, U. 3. Dept. of Agriculture, Forest Service. 



-31- 



