Hind wing with forked second longitudinal vein, weird costal process (not shown well here). In one species the marginal intercalaries of the forewing are single in the basal half and double in the distal half (at least in the males - females that might be the same species have single the whole length of the wing). The other species appear all to have single intercalaries. Mesonotal suture is concave, unlike Centroptilum
This image is created by user Theo Aaldijk at waarneming.nl, a source of nature observations in the Netherlands.
Wikimedia Commons
Description: Centroptilum luteolum. Location: The Netherlands - Oosterhout (NB) - Dommelbergenn. Date: 6 June 2012. Source: : This image is uploaded as image number 3433097 at waarneming.nl, a source of nature observations in the Netherlands.This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information.. Author: : This image is created by user Theo Aaldijk at waarneming.nl, a source of nature observations in the Netherlands.. Camera location51° 39′ 07.2″ N, 4° 52′ 15.6″ EView all coordinates using: OpenStreetMap 51.652000; 4.871000.