1708 Idaea dimidiata (Single-dotted Wave)
fw: 9-11mm; Jun-Aug; cow parsley (Anthriscus sylvestris), burnet-saxifrage (Pimpinella saxifraga), hedge bedstraw (Galium album);
ID: Characterised by 2-5 dark interneural smudges distal to the dorsal half of the 3rd line of the forewing (I.trigeminata (Treble Brown-spot) shows similar smudges but has additional smudges towards the costa), these smudges vary in strength and extent; a strong dark spot at the costal end of the 1st and 3rd forewing cross-lines. Note the asymmetrical valvae in the male genitalia.
Page published 27/03/2013 (§1-5) | §6 added 08/08/2014