Atheta orbata

This was one of three rove beetles found in a vane trap in my garden and subsequently identified from its spermatheca - and much the least common of the three (the others were Atheta fungi and Amischa analis). The photos of the abdomen were taken in case I needed to key it properly (if the spermatheca proved not to be conclusive) and required detail of the abdomen that would have been lost on clearing it to access the spermatheca. As it turned out I think the spermatheca is distinctive. The final photo below shows the spermatheca with that of the Atheta fungi caught at the same time.

female Atheta orbata showing abdomen from below, above and end and spermatheca (2 orientations plus one with the spermatheca of Atheta fungi), North Elmham (Norfolk, UK), 2nd May 2024