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Hi,

in wood of Catalpa bignonioides, mining insect larvae were found. The damage involves stems and branches, from the the heartwood to the cortex.
The larvae are about 20-25 mm long. I have no idea, whta this is, but I believe in the specialists of this forum, that the animals will identified soon.

Germany, Hude (close to Bremen), in Catalpa, November 2013.

Thank you in advance!
Thomas