A medium-sized red and black species, the female usually with red-marked legs. It belongs to the subgenus Priocnemis sens. str., which includes some of the most difficult species to identify accurately. Amongst this group, the female of agilis is one of the better characterised species. The male may be confidently identified by reference to the genitalia.
A local species with the majority of records restricted to southern England. There are a few isolated records from much further north in Scotland. Also known from the Channel Islands.
Overseas it occurs through Europe, although it is rare in the south (Wolf, 1972). France, Belgium, Italy, Switzerland, Germany, Denmark, Austria, Czech Republic, Slovakia, Poland, Romania, Albania, Cyprus and Finland (Wahis, 2011).