Geometridae : Larentiinae
ABH BF

Photo © Steve Mills

Similar Norfolk Species
Red Twin-spot Carpet
Xanthorhoe spadicearia
 
Dark-barred Twin-spot Carpet
1725 Xanthorhoe ferrugata
(Clerck, 1759) 70.052
Norfolk status
Believed to be over-recorded in Norfolk.
Very similar to Red Twin-spot Carpet, which has a dark-barred form.

The notch on the inner edge of the cross-band, close to the costa, has proven to be an unreliable method to identify this species.

Red Twin-spot Carpet also has a dark-barred form, leading to confusion.
However a red-barred form of Dark-barred Twin-spot Carpet is apparently rare and should be treated as indistinguishable without dissection of the genitalia.

Using caution, only classic examples with solid black cross-bands should be assigned to this species without dissection of the genitalia.

Recorded in 65 (94%) of 69 10k Squares.
First Recorded in 1873.
Last Recorded in 2014.

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Determination
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Copyright © Jim Wheeler 2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 12-13mm.
Season: Two Generations. May-Jun. Jul-Aug.
Foodplant:   Herbaceous plants
Nat Status: Common
 Immature Adult
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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ 2015. © James Wheeler - Norfolk Moths 2015. Data © NOLA™ 2015