Clytus (Clytus) tropicus (Panzer, 1795)
biology

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[Photo © Martin Rejzek, Fuji Superia 400 35 mm film scan]

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The left picture shows a very typical gallery system created by larvae of Clytus tropicus in the bark of oak. As you can see, each gallery is filled with a dark brown frass. The colour of the frass changes to white in the vicinity of the place where the larva entered the sapwood.

The right picture shows a barkless trunk with galleries created by larvae of Clytus tropicus. In the picture you can see the place where the larva entered the sapwood. The hole is filled with a white frass. Close to this entrance hole you can see the opening the adult used for leaving the pupal cell.

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[Photo © František Kovařík, Fujichrome 100 35 mm film scan]

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Larva (4th instar), praepupae and pupae of Clytus tropicus.