Horisme aquata, the Cumbrian umber, is a moth of the family Geometridae.

Jacob Hübner first used the scientific name in 1813.

[1] It is found in Europe, where it has been recorded from Spain, France, Belgium, the Netherlands, Germany, Denmark, Sweden, Switzerland, Austria, Italy, Slovenia, Poland, Hungary, Romania, Latvia, Lithuania and Ukraine,[2] to Russia and China.

The larvae feed on Pulsatilla species.

This Melanthiini moth related article is a stub.