Grass Rivulet
| Grass rivulet | |
|---|---|
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Hexapoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Geometridae |
| Genus: | Perizoma |
| Species: | P. albulata |
| Binomial name | |
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Perizoma albulata (Denis & Schiffermüller, 1775) |
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| Synonyms | |
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Geometra albulata Denis & Schiffermüller, 1775 |
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Geometra albulata Denis & Schiffermüller, 1775
Perizoma albulata, the grass rivulet, is a moth of the genus Perizoma in the family Geometridae.
Most of Europe including Russia East to the Urals and Transcaucasia. Further East it is found in Siberia.
The wingspan is 17–21 mm."C. albulata Schiff. Related to [C. blandiata and C. minorata], [but] on an average larger, the markings much weaker, brown.In the name-type the ground-colour is white and the markings quite indistinct,light brown or grey-brown, the median band scarcely indicated except by transverse lines. Our English race is less pure white, generally somewhat suffused with greyish or yellowish, but scarcely needs a separate name.- qriseaia indicates the more extreme examples of this English race, in which the greyish tone of the markings becomes more pronounced and there is even some admixture of fuscous; the ground-colour remains white, but the hindwing is greyish. - subfasciaria Boh. is a small yellowish-grey or brownish-grey form, in general weakly marked, and occurs in some of the Scandinavian mountains and in the Shetland Islands. - ab. thules Weir is merely an extremely darkened aberration of subfasciaria, perhaps found only in the Shetlands. -dissoluta Strand, from Arctic Norway, is paler than the type, perhaps on an average smaller, but not so small as subfasciaria. It occurs also as an occasional aberration in the Swiss Alps, Bucovina and Roumania. - ab. hebudium Weir is a pure white markingless aberration of exceedingly rare occurrence except in the Hebrides, where it is comparatively frequent."
The larvae feed on the seeds of Rhinanthus minor.
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