Venusia cambrica

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Welsh wave
Venusia cambrica.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Venusia
Species:
V. cambrica
Binomial name
Venusia cambrica
Curtis, 1839 [1]
Synonyms
  • Venusia cambrica shuotsuBryk, 1949
  • Venusia cambricariaGuenée, [1858]
  • Hydrelia cambricataHerrich-Schäffer, 1861
  • Eubolia erutariaBoisduval, 1840
  • Acidalia nebulosariaFreyer, 1850
  • Tephrosia scitulariaWalker, 1860

Venusia cambrica, the Welsh wave, is a moth of the family Geometridae. It is found in Europe, western and central Siberia, Altai, Transbaikalia, the Russian Far East, the Korean Peninsula, Japan and in North America, where it can be found across Canada from Newfoundland and Labrador to British Columbia, south in the west to California, south in the east to Georgia.

Contents

Illustration from John Curtis's British Entomology Volume 6 Britishentomologyvolume6Plate759.jpg
Illustration from John Curtis's British Entomology Volume 6

The wingspan is 27–30 mm. The light grey front wing has black and brown cross lines. Two protruding black lines at the outer black cross line, near the middle of the wing, are the most striking characteristic. "Quite distinct. The black marks on the 3rd radial and 1st median distally to the outer line recall Oporinia. English specimens and (according to Herz) the Korean form are on an average rather less white, than those from Scotland and continental Europe. In general the female is slightly larger and paler than the male - ab. pygmaea Tystr. is small with the central area constricted. - ab. latefasciata Strand has the median area very broad, the lines which bound it are parallel, not approximated in the posterior part. - ab. webbi Prout has the markings almcst obliterated excepting at the costal margin and on the median vein and its branches, recalling Oporinia antumnata gueneata See Oporinia gueneata -ab. bradyi Prout has both wings uniformly suffused with dark smoke-colour, and is becoming frequent in the Sheffield district. -ab. lofthousei Prout is a quite different melanotic form from ab. bradyi; forewing suffused with smoke-colour but remaining longitudinally rayed with white in the distal area, hindwing not infuscated. Only known from North Yorkshire. [2] The larva is long and slender, with a few short setae. It is green with large, purple spots on the back and sides.

Adults are on wing from July to August in western Europe, from June to September in New Brunswick and Quebec and from March to August in California. There are two generations per year.

Figs. 7,7a,7b Larva after final moult Buckler W The larvae of the British butterflies and moths PlateCXVI.jpg
Figs. 7,7a,7b Larva after final moult

The larvae feed on the leaves of Sorbus aucuparia . Other recorded food plants include alder, apple, birch, mountain ash, serviceberry and willow.

Subspecies

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References

  1. Yu, Dicky Sick Ki. "Venusia cambrica Curtis 1839". Home of Ichneumonoidea. Taxapad. Archived from the original on March 25, 2016.
  2. Prout, L. B. 1912–16. Geometridae. In A. Seitz (ed.) The Macrolepidoptera of the World. The Palaearctic Geometridae, 4. 479 pp. Alfred Kernen, Stuttgart.