Species Account

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Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Scarce and local resident.

Local Record: Grade 2   See here for explanation

Flight time: Two generations, May-Jun, Aug-Sep.

Forewing: 16-19mm.

Foodplant: St John's-worts.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded190519821905
Year last recorded201120112011
Number of records9047274
Number of individuals10888392
Unique positions30774
Unique locations27666
Adult records8845266
Immature records012

For the region, we have a total of 274 records from 66 sites. Earliest record on file is in 1905.


1868 Lesser Treble-bar 02
© Les Hill
1868 Lesser Treble-bar 01
© Tom Morris

Species Account

Similar species: 1867 Treble-bar Aplocera plagiata.

For further information refer UK Moths.

Davey, P., 2009: A frequent species across southern England, but local in northern England and Wales, the larva feeding on st john's-wort (Hypericum spp.). In Dorset, the moth has been recorded from the same range of habitat types as the Treble-bar1867. Localities where both species have occurred are as follows.

1 West Bexington, Woolgarston, West Blagdon, Durlston
2 Chase Woods, Gaunt's Common, Stubhampton Bottom, Iwerne Minster
3 Ashington
4 Arne, Hurn, Boys Wood, Bloxworth Wood
5 Brownsea Island, Holt Heath, Holton Heath Marsh

Diagnostics include: paler ground colour; inner dark 'bar' resembles flag and flag-pole rather than hockey-stick.


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