Lithosia quadra Linnaeus, 1758 ♀
Common names: Four-spotted Footman [En], Lithosie quadrille, Jaune à quatre points [Fr], Viervlakvlinder [Nl], Vierpunkt-Flechtenbärchen [De]
Barhal, ARTVİN ● Turkey
Description: The wingspan is 35–55 mm. There is strong sexual dimorphism in the imago.
The male is smaller than the female. It has gray wings with a yellow wingjoint and a blue-black stripe at the front of the outer rim of the forewing.
The female has yellow wings with two blue-black dots, which give the species its name; one dot is above the inner margin, often there appears to be only three spots, as the wings overlap when at rest.
or both (ab. impunctata Spul.) may be absent in the female, or
The larva is grey, with thin longitudinal lines, a transverse black spot each across the back anteriorly, in the centre and behind, and subdorsally there are longitudinal rows of small reddish yellow warts.
Some variations have been recorded on the male:
• f. luteomarginata Lambillion, 1906 – aire discale non assombrie ;
• f. seminigra Dufay, 1954 – aile antérieure envahit de gris noirâtre, sur près du tiers de sa longueur.
On the female:
• f.unipunctata Spuler, 1910 – forewing with one single dot;
• f. impuctata Spuler, 1910 – without dot;
• f. confluens Dumont, 1903 or f. fasciata Spuler, 1910 – dots replaced by a transverse band.
Biology: The moth flies from June to September depending on the location. In the south of the area there is occasionally a second brood. The species hibernates as a small larva and pupates in a loose cocoon in a crevice.
The larvae feed on lichens on the bark of deciduous trees, especially oak.
Habitat: Forests, wooden areas.
Distribution: Southern and central Europe, then east across the Palearctic to the Amur River and Japan. It is also found in the south of Great Britain and Scandinavia.
Lepidoptera of Belgium
Wikipedia, Lithosia quadra