Ophion crassicornis Brock, 1982

Verheyde, Fons, Hoekstra, Paul, Libert, Pierre-Nicolas, Meijer, Hilco, Ketelaere, Augustijn De, Vandaudenard, Thibaud, Belgers, Dick & Brosens, Edwin, 1880, Two hundred and five ichneumonid wasps reported for the first time in Belgium and the Netherlands (Hymenoptera: Ichneumonidae), Belgian Journal of Entomology 122, pp. 1-142 : 81-82

Ophion crassicornis Brock, 1982

Another large species (fore wing length 15–16 mm and 57–61 flagellomeres). It can be especially confused with O. borealis Johansson, 2019 . However, O. crassicornis has a distance between the tentorial pits and compound eyes that is smaller than the distance between the cavities, while this distance is almost equal in O. borealis . Additionally, the sides of the scutellum in the known specimens are usually paler than the rest of the scutellum, while they are concolorous in O. borealis ( JOHANSSON & CEDERBERG, 2019) .

First report for Belgium and the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Havelange (NA); 50°23’07”N 5°15’42”E; 2/vi/2020; T. Vandaudenard leg.; coll. TV; light trap; N. Johansson & T. Vandaudenard det. (ObsID: 211823443) .

THE NETHERLANDS: • 1 ♀; Beusichem (GE); 51°57’23”N 5°16’46”E; 17/v/2014; P. Hoekstra leg.; coll . PH; light trap; P. Hoekstra & N. Johansson det. (ObsID: 184430720) .