"Oncopodura crassicornis" from the UK. "Original description on Flickr:" :"After finding O. crassicornis in my sister's garden last month... I wasn't expecting to find it again so soon, but here it is, in the poly-tunnel greenhouse on the farm where I live, a little smaller than the one I found up in Yorkshire- I reckon no more than 0.6mm this time. They like disturbed ground so under stones and wood in gardens are a good place to look."