Nymphula nitidulata

Nymphula nitidulata, the beautiful china-mark, is a species of moth of the family Crambidae described by Johann Siegfried Hufnagel in 1767. It is found in Europe, Japan, Turkey, Armenia, Russia and China.
[Image:P1110699 Nymphula stagnata.jpg|thumb|left|200px]
The wingspan is 20–25 mm. The forewings are white; costal
edge and sometimes a subcostal line dark fuscous; a curved dark fuscous subbasal line; lines and transverse discal spots strongly outlined with dark fuscous, sometimes partly brownish, first curved, second indented below middle, connected by a prolongation with discal spot and first line, lines sometimes also connected on dorsum; a yellow-ochreous dark-margined terminal streak. Hindwings as forewings, but lines narrower, not connected, subbasal absent, discal mark oblique, narrow, dark fuscous, usually touching first line The larva is bright yellow or brownish-yellow; dorsalline dark brownish; head pale brown.
Image:Buckler W The larvæ of the British [butterflies and moths PlateCLII.jpg|thumb|140px|left|Figs.1 egg mass 1a, 1b, ic, 1d, 1e, 1f larvae in various stages of growth 1g, 1h cocoons 1ilarva highly magnified (mining Sparganium simplex and S. ramosum underwater)]
The larvae feed on Sparganium and Nuphar lutea.