Enochrus melanocephalus

One of my first attempts at identifying an Enochrus led to an ID of melanocephalus, but upon reviewing my Hydrophilidae records recently it was immediately clear that this was a misidentification. So it was good to find a real one 2-3 months later. The very black legs and underparts set this apart from other Enochrus I've seen, although it was the proportional length of the maxillary palp segments that clinched the ID.

Enochrus melanocephalus showing scutellum, maxillary palp and underparts, Wendling Beck Environment Project (Norfolk, UK), 9th August 2023