73.162 (2321) Dark Arches Apamea monoglypha (Hufnagel, 1766)

Resident. Common.
Flight period

Lennon (1863) had found it common around the Dumfries area. Douglas Robinson (1870-71) had found it swarming all summer on Almorness (VC73) with several dark varities; obviously, the form known as 'aethiops.' K. J. Morton of Edinburgh (1900) whilst on a visit in July 1899 to Wigtownshire had found this species in the Monreith area. Gordon (1913) had found it abundant everywhere in Wigtownshire and variable in colour, form 'aethiops' being plentiful. Earliest date was 13th June 1897. Evans (1915) during his research into migration at Scottish lighthouses received from D. A. Mowat, keeper at Killantringan Lighthouse, Wigtownshire, a total of 84 specimens, with 22 taken in a single night late July 1913 and 25 in July, 1914. One or two were of the black form 'aethiops.'
Archibald Russell (1944) listed it as occurring near Gatehouse of Fleet (VC73) during the years 1942-43. Further records occurred from varied sites through the 1950s to early 1970s when the Rothamsted stations were set up. Data from them shows it to have been recorded at all seven stations up to 1993. From then until 2010 personal trapping has recorded it from widespread sites across the region and in good numbers, proving Dark Arches to be one of our commonest noctuid moths.
Form aethiops Staudinger
This form occurs alongside the nominate form and was first recorded in 1982. It is regularly recorded.

Form infuscata White
One of this form was trapped at Low Cordorcan near Newton Stewart on 5th July 2014.
Life cycle
One generation. Overwinters as a larva among grass roots in a chamber, during August to June, with pupation underground.
Larval foodplants
Larvae feed on grasses.
Variable in colour, but distinctive.
Wide range of habitats.
Recorders' notes
Records of the form aethiops would be appreciated.
© Keith Naylor, Dalbeattie, 28 July 2007
© Keith Naylor, Blackpark Marsh, 8 August 2005, f. aethiops
© Barry Nattrass, Low Cordorcan, 5 July 2014, f. infuscata

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Distribution map displays records from the National Biodiversity Network (See terms and conditions).

The following datasets are included:

  • Butterfly Conservation - Macro-moth provisional distribution for the British Isles (excluding the Republic of Ireland) from the National Moth Recording Scheme
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