Mnesictena marmarina, also known as the Brown nettle moth, is a snout moth in the subfamily Spilomelinae of the family Crambidae.

[2] It is endemic to New Zealand.

[1] This species is similar in appearance to Mnesictena flavidalis but is distinguished by being larger in size and having a clear white spot on its forewings.

Larvae of this species feed on plants in the genus Urtica, including Urtica ferox.

This Spilomelinae-related article is a stub.