Yorkshire Status: Common and fairly widespread resident.

There is considerable confusion separating Lesser Treble-bar from the larger and less common Treble-bar. See the comments under that species for further details. Lesser Treble-bar is by far the commoner of the two species in Yorkshire, especially in lowland areas of the south and east. It seems to be doing well in the county and can appear in good numbers at times for example 71 at Kilnwick Chalk Pit on 13/8/2011. Since the comments in Sutton and Beaumont below, the range has increased considerably to the north and it is now found in central Scotland.

Sutton & Beaumont, 1989: Skinner (1984) states Yorkshire to be the northern limit of this species and certainly northern County records are very sparse. There is only one recent record from VC62 (Sleightholmedale, 27.7.1984, specimen kept (GWF)) and there is none from VC65 (though it does occur rather uncommonly in Durham, VC66 (Dunn & Parrack, 1986)). In vice-counties 61, 63 and 64, however, it is reported from many sites, being much more frequent in these than A. plagiata (Linnaeus) is in higher areas.

Recorded in 73 (37%) of 200 10k Squares. First Recorded in 1926. Last Recorded in 2023. Additional Stats

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