Noctua janthe

{{Short description|Species of moth}}

{{Italic title}}

{{Speciesbox

| name = Lesser broad-bordered yellow underwing

| image = Noctua janthe01.jpg

| image_caption =

| taxon = Noctua janthe

| authority = Borkhausen, 1792

}}

Noctua janthe, the lesser broad-bordered yellow underwing, is a moth of the family Noctuoidea. Some authors consider Noctua janthe and Noctua janthina to be the same species. It is found in Europe and North Africa.

File:Noctua janthe-u.jpg

Image:Moths of the British Isles Plate116.jpg 3. lesser broad-bordered yellow underwing Noctua janthe 4. least yellow underwing Noctua interjecta]]

The wingspan is 30–40 mm. The length of the forewings is 16–20 mm. The ground colour of the forewings varies from bright ochre to gray to brown, often with a reddish or light purple tint. Orbicular and reniform are not clearly marked. The hindwing is orange-yellow with a broad distal black band. This species can only be separated from Noctua janthina by examination of the genitalia. Michael Fibiger: Noctuidae Europaeae, Volume 2 Noctuinae II. Entomological Press, Sorø, 1993, ISBN 87-89430-02-6.

Walter Forster, Theodor A. Wohlfahrt: Die Schmetterlinge Mitteleuropas. Band 4: Eulen. (Noctuidae). Franckh’sche Verlagshandlung, Stuttgart 1971, ISBN 3-440-03752-5.See Townsend et al.Martin C. Townsend, Jon Clifton and Brian Goodey (2010). [https://butterfly-conservation.org/uploads/Difficult_species_guide_page_50.pdf British and Irish Moths: An Illustrated Guide to Selected Difficult Species]. (covering the use of genitalia characters and other features) Butterfly Conservation.

The moth flies in one generation from late June to September.{{ref|flight_season}}

The larvae feed on various deciduous trees, shrubs and herbaceous plants.{{cite web|url= http://www.nhm.ac.uk/research-curation/research/projects/hostplants/ |title= Robinson, G.S., P.R. Ackery, I.J. Kitching, G.W. Beccaloni & L.M. Hernández. (2010). HOSTS – A Database of the World's Lepidopteran Hostplants. Natural History Museum, London.}}