1708 Idaea dimidiata (Single-dotted Wave)
fw: 9-11mm; Jun-Aug; cow parsley (Anthriscus sylvestris), burnet-saxifrage (Pimpinella saxifraga), hedge bedstraw (Galium album);
Idaea dimidiata (Single-dotted Wave) §2
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.
Variation
Dissection
Male genitalia
§1Foulness, Essex; 05/07/2009
§2 Horsey, Norfolk; 14/07/2008
§3 Newborough Forest, Anglesey; 30/07/2007
§4 Aldbrough, Humberside; 03/09/92010
§5 Foulness, Essex; 16/09/2012; male
§6 Strumpshaw Fen, Norfolk; 25/07/2014; male
§7 Romansleigh, Devon; 29/06/2016; male; fw 10.4mm; to light
§8 New Forest, Hampshire; 18/06/2016; male; fw 9.3mm; to light
All images © Chris Lewis
§2 Horsey, Norfolk; 14/07/2008
§3 Newborough Forest, Anglesey; 30/07/2007
§4 Aldbrough, Humberside; 03/09/92010
§5 Foulness, Essex; 16/09/2012; male
§6 Strumpshaw Fen, Norfolk; 25/07/2014; male
§7 Romansleigh, Devon; 29/06/2016; male; fw 10.4mm; to light
§8 New Forest, Hampshire; 18/06/2016; male; fw 9.3mm; to light
All images © Chris Lewis
Page published 27/03/2013 (§1-5) | §6 added 08/08/2014 | §7 added 08/04/2017 | §8 added 29/05/2017
