Take this one for instance
I think this a Xantholinus sp. At 8mm and with microstructure (but not too strong microstructure) it keys out as Xantholinus gallicus - but there aren't many records on NBN and I guess I'll need to wait and compare to some known specimens in a collection somewhere.
Someone somewhere reading this will be asking what the $%£@ is microstructure?
So glad you asked.....
You can make it out at about 40x magnification but it's the very fine structure (in this case) on the pronotum
|Microstructure of Xantholinus gallicus (credit http://www.micropics.org.uk/)|