Yorkshire Status: Local resident.

Separating Treble-bar and Lesser Treble-bar is not the easiest task if you are not familiar with both species, in fact they were considered to be the same species until 1923. The angulation of the basal cross band is often mentioned as a distinguishing feature but this is tricky and not really reliable. A better way (as long as you have got a male) is to look at the tip of the abdomen. The longer claspers of Treble-bar give it a more pointed appearance. See the pictures on page 134 of the third edition of the Field Guide. This is by far the least common of the two species though it can the the commonest in the north and west of the county and it is also regularly encountered in the east of VC63. The other feature is that it is larger than Lesser Treble-bar. Both of these species are bivoltine in Yorkshire and both feed on St John's Worts (Hypericum sp). We hope that the distribution maps are accurate but you can never be quite sure with these two species!

Sutton & Beaumont, 1989: A rather local species, mostly confined to the high ground in the north and west of the County.

Recorded in 64 (32%) of 200 10k Squares. First Recorded in 1886. Last Recorded in 2023. Additional Stats

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