Scolytidae: Pine shoot beetle Tomicus piniperda on Scotch pine, Pinus sylvestris.
The beetle is attracted to monoterpenes evaporating from the wound resin globules seen at the upper right of the picture.
Olfactory recognition of host-tree susceptibility by pine shoot beetles. Naturwissenschaften 72:324-326.

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Images © 1996 by John A. Byers, Chemical Ecology.