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

 1 



Figure 58. — Typical winding egg galleries of the western pine beetle marking 

 the surface of ponderosa pine sapwood. 



tinguished from those of the western pine beetle, and the methods 

 of control are the same. Since this beetle is less aggressive than 

 the western pine beetle, control measures are seldom required. 



The roundheaded pine beetle {Dendroctonns convexifrons 

 Hopk.) attacks ponderosa pine throughout the same range as the 

 southwestern pine beetle and often in company with it. This spe- 

 cies usually enters the lower portion of trees previously infested 

 by other bark beetles, but is sometimes primary in its attack upon 

 decadent or weakened trees. The adults are about y 4 inch long and 

 are a dark, shiny brown or black. The egg galleries are mostly 



