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Scoparia basistrigalis
Base-lined Grey Knaggs, 1866
Crambidae: Scopariinae
1334a / 63.063
Photo © Stephen Youngs,  24/06/2018 - Norwich

Similar Norfolk Species
Ground-moss Grey
Eudonia truncicolella
Common Grey
Scoparia ambigualis
Wingspan: 20-23mm
Flight: June - Aug
Foodplant:   Moss.
Nat Status: Local
Verification Grade:  Adult: 2
Norfolk Status
Deciduous woodland.
One of several very similar moths which can be difficult to separate, best identified by means of genitalia dissection.
In general a little larger than S. ambigualis, with heavier markings, greyer in colour, and stongly chequred fringe.

C. Barrett [VCH 1901] "Eudorea asistrigalis, Knaggs. Norwich, Aldeby, Denton ; scarce"

Mainly unconfirmed records up to 2009. Confirmed records from East Winch Common and Tyrrel's Wood in 2009 and Boughton Fen, Ashwellthorpe Wood and Dersingham in 2010. Many more records from 2010 onwards, confirmed via genitalia dissection which shows the species is now well established in Norfolk.

Recorded in 46 (67%) of 69 10k Squares.
First Recorded in 1884.
Last Recorded in 2021.

Latest 5 Records
Date#VC10k Area
16/06/2021127TG11 - Drayton/Swannington
06/06/2021228TL99 - Thompson/Gt.Hockham
11/08/2020127TG30 - Brundall/Cantley
05/08/2020128TL79 - Methwold/Foulden
04/08/2020128TF92 - Fakenham/Ryburgh
Further info: Scoparia basistrigalis
UK Moths
Mothdissection UK
Suffolk Moths
Cambs Moths Norfolk Moths (Full)
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