Bugs on parsnips

[Rocketron]

I have some blackbugs/beetles munching their way through my parsnip leaves. I've no idea what they are and have never heard of anything like this. Any ideas ?
(Incapable of providing pics, btw)
Pics now available.
http://i109.photobucket.com/albums/n...2/PIC02260.jpg
http://i109.photobucket.com/albums/n...2/PIC02259.jpg