59.014 Boloria (clossiana) euphrosyne (Pearl-bordered Fritillary)
ws: m38-46mm, f43-47mm; May-Jun, from late April and sometimes bivoltine Aug in S.England; common/heath dog-violet / marsh violet (Viola riviniana/canina/palustris); declining in open areas of deciduous woodland in scattered colonies mainly in S.England and C.Scotland.
ID: Underside hindwing with 7 interneural silvery-white chevrons (pearls) along the terminal border; a further central white mark distal to an orange cell containing a small black spot and a further smaller white mark basodorsal to this cell. Similar to B.selene (Small Pearl-bordered Fritillary) which also has the terminal pearls, but has a large black spot in the orange cell and several additional white cells in the basal half of the hindwing underside. Where B.euphrosyne shows a reddish-orange angular cap to each of the terminal pearls and a row of reddish-orange spots proximal to these, in B.selene these marks are black.
Page published 24/05/2014