Trypodendron lineatum

Trypodendron lineatum, known generally as striped ambrosia beetle, is a species of typical bark beetle in the family Curculionidae. Other common names include the two-striped timber beetle, conifer ambrosia beetle, and spruce timber beetle. It's a woodboring beetle that cultivates symbiotic fungi inside galleries in the xylem of primarily conifer trees, which serve as the primary food source for developing larvae. The species has a Holarctic distribution as a major forest pest.