| Lythria purpuraria | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Geometridae |
| Genus: | Lythria |
| Species: | L. purpuraria |
| Binomial name | |
| Lythria purpuraria (Linnaeus, 1758) | |
Lythria purpuraria, the purple-barred yellow, is a species of moth of the family Geometridae. It is found from western Europe to Siberia, Russia, Ukraine, Turkmenistan and Kazakhstan.
L. purpuraria generally have two red-purple transverse lines in their green-yellow forewings. They are often confused with L. cruentaria, a sister species in the same family. This is because they are both available in a variety of sizes with multiple wing patterns. [1] L. purpuraria and the other four species within the Lythria family have a very difficult genitalia structure, which is complicated to analyze and study. [2]
Adults are on wing from April to June and again from July to September. It is a day-flying species. There are two generations per year.
The larvae feed on prostrate knotweed, also known as Polygonum aviculare . [3]
