Distribution in Iran. Fars (Lashkari Bod et al. 2010, 2011; Fischer et al. 2011; Khajeh et al. 2014), Khorasan (Ghahari et al. 2011 a), Mazandaran (Ghahari et al. 2010 a as Chorebus longicornis (Nees)).
Distribution outside Iran. Entire Europe and Madeira to Russian Far East (Fischer et al. 2011), frequent in Europe (Shenefelt 1974). Austria, Belgium, Faeroe Islands, France, Germany, Iceland, Ireland, Italy, Madeira Islands, Netherlands, Poland, Sweden, Ukraine and former Yugoslavia (Yu et al. 2012), Croatia (Graeffe 1908), Czech Republic (Lozan et al. 2010; Yu et al. 2012), Greece (Ferrière 1930; Papp 2007 a; Yu et al. 2012), Hungary (Papp 2004 a; Yu et al. 2012), Korea (Papp 2007 b as Chorebus longicornis; Yu et al. 2012), Macedonia (Papp 2009 b; Yu et al. 2012), Mongolia (Papp 2005 a as Chorebus longicornis; Yu et al. 2012), Russia (Tobias 1998 as C. longicornis; Lelej 2012; Yu et al. 2012), Serbia (Žikić et al. 2000; Papp 2009 b; Yu et al. 2012), Spain (Shenefelt 1974, Tormos 1986, Docavo et al. 1986, 1992, Francés and Jiménez 1989 a; Yu et al. 2012), UK (Nixon 1937 as Dacnusa affinis; Nixon 1949 as Gyrocampa affinis; Shenefelt 1974; Yu et al. 2012).
Host records. Rhopalosiphum nymphaea (L., 1761) (Hemiptera: Aphididae) (Yu et al. 2012). Also recorded from Hydrellia griseola (Fallen, 1813) (Diptera: Ephydridae) and Phytomyza rufipes Meigen, 1830 (Diptera: Agromyzidae) (Lelej 2012).