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The last tergite of the abdomen has a strong, projecting spike, thus giving the group its common name of horntail. This is a very large (up to 4 cm long) sawfly with a distinctive yellow and black banded abdomen.
Usually found in or near coniferous woods.
May to October.
The larvae feed on dead wood.
British status to follow.
Status in Leicestershire and Rutland to follow.
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