I have recently moved into an old timber frame house (c1500) in the Essex/Suffolk borders and have started to find the beetles shown in the attached image, in their death throws on the carpet under the bedroom window. I can't find any wood dust or boreholes and don't know where they are coming from. In the last week I have found 20 of them.
As you can see they are about 5-6mms long, and have a shiny black back with an obvious green sheen.
Can anyone help ID them please - I've tried every possible Google image search and can't find them.
Thanks in anticipation.
They look hairy (and dusty) so: Korynetes caeruleus? The larvae of this fella lives on the larvae of wood-boring beetles (like Anobiidae) and might be a sign of an infestation of those latter.
Thank you for the replies guys.
I had rather hopefully wanted them to have been something that had flown in through the window and were nice friendly leaf-eating bugs.
So it's up into the loft and time to splosh around lots of nasty chemicals!
Thanks again - here's to the power of the Interweb!