Chlorops strigulus (Fabricius, 1794)
Brachypodium sylvaticum, Belgium, prov. Namur, Andenne, carrière du Bois de Tiarmont; © Jean Yves Baugnée
the gall causer, reared male
Brachypodium sylvaticum, France, dép Sarthe, Vancé © Sébastien Carbonelle. Probably this vacated gall was equally caused by some Chlorops.
Poaceae, monophagous (?)
Brachypodium pinnatum, sylvaticum.
Galls of this type generally are referred to Chlorops pumilionis, but in fact a number of species are involved, that can only be identified on the basis of reared material. C. strigulus is characterised by the large frontal triangle, far drawn out anteriorly and with deep grooves at either side, and by the white arista (JY Baugnée).
Spooner & Bowdrey (2012a), Dauphin & Aniotsbehere (1997a).