Cock-chafers

This is the cockchafer. You spend years getting your lawn just right and then this nasty little bug comes along, lays eggs all over it, and its disgusting larvae turn the whole thing into a wasteland.

The analogy with the Labour party and all the parasites it has inflicted on Britain is so exact that I hope the name will stick.

Plus it has a nice Shakespearian ring to it, making it an elegant alternative to the more usual epithet.