Pityogenes chalcographus

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Pityogenes chalcographus (click on image to enlarge it)
Author(s): Robert Dzwonkowski
Source: IPM Images

Pityogenes chalcographus (Linnaeus) - (six-dentated bark beetle)

This bark beetle is common in dead branches or in the crowns of wind-felled spruce trees in central and northern Europe, but also attacks young and weakened standing trees, particularly during droughts. The galleries are arranged in a star-like pattern. There are usually 2 generations per year. The larvae overwinter in the bark of trees, the adults in litter on the ground. The adult is 2-2½ mm long, brown to black. Two "biological races" have been described from northeastern and Central Europe which do not interbreed.

Vernacular names
• Deutsch: Kupferstecher
Sechszähniger Fichtenborkenkäfer
• English: six-dentated bark beetle
six-toothed spruce engraver beetle
• Español: barrenillo pequeño del abeto
• Français: bostryche chalcographe

The pronotum is covered with small knobs in its anterior part and has a middle keel. The elytra are lighter in colour and have longitudinal rows of poorly developed dots as well as 3 teeth each near the end. The teeth are more prominent in the males.