F-501808 
Figure 153.—Galls in pine produced by the pine gall 
weevil, Podapion gallicola. 
branches of living, suppressed elms. The adult (fig. 154) is reddish and somewhat 
smaller than the adult of the black elm bark beetle. Eggs are deposited in punctures 
in the bark, often in groups around knots or at the bases of twigs. Larval tunnels 
usually radiate away from the egg-laying site and follow the grain of the wood, 
scarring both the inner bark and the wood. Pupation occurs in cells at the end of the 
tunnels. There is one generation per year (554). 
Magdalis perforatus Horn breeds in the dead and dying branches of pines from 
Canada to Florida. The adult is bluish black, wedge shaped, shiny, and from 4 to 6 
mm long. Eggs are deposited singly in pits chewed in the base of needle fascicles at 
or near the tips of branches. The larvae bore to the center of the stem and then 
tunnel through the pith toward its base. Trees under 4 m tall killed by insects or 
disease appear to be preferred; however, slash left during thinning or pruning 
operations and the dead, lower branches of old trees in closed stands are also 
attacked. Adults feed on the new shoots of pines, usually on trees growing in young, 
open stands. Prepupae overwinter in the pith. Pupation occurs in May, and adults 
emerge in June (S22). 
F-519947 
Figure 154.—Adult of the red elm bark weevil, Magdalis 
armicollis. 
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