The species closely resembles Rivula sericealis.
The wingspan is 25–28 mm. The forewings are whitish-ochreous, disc and apex sometimes tinged with yellowish-brown; lines fine, dark brown, very obliquely curved, indented beneath costa, first very indistinct towards costa; two small transversely placed discal spots outlined with dark fuscous, lower larger; a dark fuscous oblique apical streak; margins of subterminal line obscurely brownish. The hindwings are ochreous- whitish with a grey posterior line.
The larva is yellowish-green; dorsal and lateral lines darker green; head yellowish[1]
The length of the forewings 12–14 mm. The moth flies from May to September depending on the location.
^Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf This article incorporates text from this source, which is in the public domain. Keys and description
Further reading
Mark Parsons, Sean Clancy, David Wilson A Guide to the Pyralid and Crambid Moths of Britain and Ireland: Atropos, England. ISBN:9780955108648