Dusona bicoloripes (Ashmead, 1906)

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 : 38-39

Dusona bicoloripes (Ashmead, 1906) (Fig. 11)

Superficially Dusona spp. resemble Casinaria spp. , but belonging to the former tribe of Porizontini the suture on the first tergite is often indistinct or absent.

Dusona bicoloripes belongs to the group with the epipleurum of the third gastral tergite separated from the tergite. The specimen from Zedelgem ( Belgium) measured 11.5 mm and had 49–50 flagellomeres. There is one diagnostic character, the frons has a small raised point between its eye and its antennal socket. The metasoma has some of the middle tergites red, the others black ( HORSTMANN, 2009; see Fig. 11). Lymantria dispar (Linnaeus 1758) ( Lepidoptera : Erebidae ) is considered to be the main host ( SAWONIEWICZ, 1979).

First report for Belgium and the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 2 ♀♀; Somal (NA); 10/v/2006; P-N. Libert leg.; coll. PNL; field observation; K. Horstmann det. • 1 ♀; Zedelgem, Militair domein Vloethemveld - Oud elzen-beukenzomereikenbos Perceel 71 (WVL); 22/v/2020; W. Dekoninck et al. (KBIN) leg.; coll. KBIN/RBINS (project Bruges heathlands); pitfall trap (8–22); F. Verheyde det.

THE NETHERLANDS: • 1 ♀; Drunen , Loonse en Drunense Duinen (NB); 51°38’21”N 5°06’22”E; 11/viii/2014; P. Hoekstra leg.; coll. KZ; field observation; K. Zwakhals det. (ObsID: 143737056). • 1 ♀; Wageningen (GE); 51°57’59”N 5°40’24”E; 25/iv/2020; D. Belgers leg.; coll. KZ; field observation in skylight; K. Zwakhals det. (ObsID: 189675058); Fig. 11. • 1 ♀; Ameland (FR); 53°27’01”N 5°38’51”E; 24/v/2020; P. Hoekstra leg.; coll . PH; yellow pan trap (19–24); P. Hoekstra det. (ObsID: 203062104) .