34 MISC. PUBLICATION 2738, U. 8S. DEPT. OF AGRICULTURE 
Late in the spring and in the early part of the summer the adults 
feed on the tender bark of the previous year’s terminals and with 
their beaks make little cavities in which eggs are laid. The young 
larvae, which are white, legless, curled grubs, work down the stem, 
boring through the bark and into the wood. Upon reaching maturity 
FicurRE 14.—The lodgepole terminal weevil (Pissodes terminalis): A, Grubs in 
Me ce shoots; 6b, weeviled tip showing emergence hole; C, adults, natural 
they form in the wood or pith an oval cell lined with shredded wood 
fiber in which to pupate. There appears to be only one generation 
a year, but some of the insects transform in the fall of the year and 
others change and emerge the following spring. The winter is passed 
in all stages except the egg. Upon emergence the new adults do 
some feeding on the fresh bark of the terminal shoots and make 
numerous small feeding punctures, which later heal over with a bit 
of resin. No effort has yet been made to control this species. 
Similar in habits and appearance to the above is the Engelmann 
spruce weevil (Pissodes engelmanni Hopk.). It works in the termi- 
nals of Engelmann spruce throughout this tree’s range, in the Rocky 
Mountain region and the Pacific Northwest. 
The lodgepole terminal weevil (Pissodes terminalis Hopp.) (71b) 
mines through the pith of lodgepole pine terminals (fig. 14) and kills 
them down to the first whorl of branches. It is particularly de- 
structive in open-grown stands of young lodgepole pine in California. 
