Feathered Gothic Noctuidae

Tholera decimalis (Poda, 1761)

Description: Wingspan 38-48 mm. Forewings brown marked with a series of pale whitish lines. The stigmata are conspicuous and finely outlined in pale yellow. Subterminal line is irregular, creamy white in colour with a series of small internal black wedges running across the wing. Hindwings are whitish brown, with a small discal spot and a white fringe.

Key Identification Features:

Sets:  male upperside

Flight Period: Mid-August to early September.

Status: Scarce and very local. There have been records from only three sites since 1990 in Down and Tyrone. It has regularly been trapped at Killard Point National Nature Reserve, Down. The only other post 1990 records are from Clogher, Tyrone in 1996 and Derryleckagh, Down in 1991. It has not been recorded in Armagh since the late 1970's when adults were taken at Loughgall and Richhill. There are older records from Tandragee in the early 1930s and Drumbanagher near Jerrerttspass in 1940.

Ecology: A late summer species preferring sandy soils and found manly in rough grassland and marshy areas. Adults are attracted to light, especially the males. The larvae are nocturnal, feeding from March to July on various grasses. It overwinters as an egg.

World Distribution: Throughout western Europe as far north as central Scandinavia.

Bradley & Fletcher number: 2178 Agassiz number: 73.253

Additional information:

UK Moths account

Caterpillar: 

 Thompson, R. S. & Nelson, B., 2003 (Oct 2). [In] The Butterflies and Moths of Northern Ireland
http://www.ulstermuseum.org.uk/lepidoptera/species.asp?item=6271

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