I came across this colorful little sawfly today. It was windy, making it difficult to focus the camera, so the pictures are a bit rough around the edges. I did some research on the Internet, and although it's difficult to identify a species by a picture alone I think I've got this right ... this is a Rose Sawfly (Arge ochropa), a European transplant.
For more images of this insect and further reading follow the links below: