Perizoma albulata

Grass rivulet
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Perizoma
Species: P. albulata
Binomial name
Perizoma albulata
Denis & Schiffermüller, 1775
Synonyms

Geometra albulata Denis & Schiffermüller, 1775

Perizoma albulata, the grass rivulet, is a moth of the genus Perizoma in the family Geometridae.

Distribution

Most of Europe including Russia East to the Urals and Transcaucasia.Further East it is found in Siberia.

Description

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." [1]

Biology

The larvafeeds on the seeds of Rhinanthus minor.

References

  1. ↑ Prout , L.B. 1912–16. Geometridae. In A. Seitz (ed.) The Macrolepidoptera of the World. The Palaearctic Geometridae, 4. 479 pp. Alfred Kernen, Stuttgart.


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