Monochroa niphognatha (Gozmány, 1953)
35.0780 (B&F: 740a)
The larva is thought to use Amphibious Bistort as its foodplant, feeding in the stem. The adult comes weakly to light. There was a small colony in Kent (at Stodmarsh) between 1984 and 1995, but has only been recorded there once since, in 2017. Singles have turned up once in Plymouth, Devon (in 2002), and once in Southsea, Hampshire (in 2009). Abroad it is reported as "Very local in north western and central Europe" (Clark, 2020).