Trypodendron

Trypodendron

Trypodendron

( Latin: Xyloterus )

Timber showing the activities of this ambrosia beetle is quite commonly seen in Europe. It lives in conifers; others are associated with deciduous trees.

After mating the female drives a short tunnel into the trunk of the tree, and from this she makes two or three horizontal egg-galleries, which usually follow the annual rings. She then gnaws small niches in the roof and floor of the galleries and lays an egg in each one. When they hatch the larvae somewhat enlarge the niches but they do not gnaw true tunnels in the wood, for they feed on the fungal growths already mentioned. Each larva pupates in its own chamber and the adult beetles emerge from the tunnel system by the same route as their parents entered.