This image probably won't help anyone very much, but it's sort of inspired by darky's comments regarding the mouthparts of the beetle.
That said, you could probably actually get down to species from this photo if you knew where to look.
Oh, and if anyone's interested, I've upgraded to blogger beta which turns out to be a mixed blessing. It appears to be no longer compatible with Picasa. And the new template tools looked promising but unfortunately were too rudimentary and inflexible for my needs.