Noctua
Characterised by bright yellow hindwings with a black subterminal fascia. This pattern is also seen in Anarta myrtilli (Beautiful Yellow Underwing) and A.cordigera (Small Dark Yellow Underwing) both of which are smaller (fw 10-12mm) than any Noctua species and have a different forewing pattern. Thalpophila matura (Straw Underwing) has a much paler yellowish hindwing with a brown border.
There are diagnostic differences in the hindwing pattern between the Noctua species; but all the commoner species can be readily separated without recourse to hindwing examination. Separating N.orbona/comes and N.janthina/janthe requires a more detailed examination (see the relevant pages).
There are diagnostic differences in the hindwing pattern between the Noctua species; but all the commoner species can be readily separated without recourse to hindwing examination. Separating N.orbona/comes and N.janthina/janthe requires a more detailed examination (see the relevant pages).
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342 Noctua pronuba
(Large Yellow Underwing) 
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343 Noctua fimbriata
(Broad-bordered Yellow Underwing) 
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344 Noctua orbona (Lunar Yellow Underwing)
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345 Noctua comes
(Lesser Yellow Underwing) 
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346 Noctua interjecta
(Least Yellow Underwing) 
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347 Noctua janthina
(Langmaid's Yellow Underwing) 
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348 Noctua janthe
(Lesser Broad-bordered Yellow Underwing) 
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