Theroscopus trifasciatus Förster, 1850

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 : 102-103

Theroscopus trifasciatus Förster, 1850 (Fig. 52)

This species belongs to the smaller group of Theroscopus spp. with brachypterous or apterous females. T. trifasciatus is wingless and predominantly yellowish brown. Its antennal segments are brownish to yellow basally, reaching at least over the middle of the entire antenna. Its head is black. The metasoma has black transverse bands and scattered (short) white hairs

( HORSTMANN, 1993). Its apical tergites have white marks (Fig. 52). First report for Belgium and the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Zedelgem, Militair domein Vloethemveld - Nat jong berkenbos (Bestand 93); 26/vi/2020; W. Dekoninck et al. (KBIN) leg.; coll. KBIN/RBINS (project Bruges heathlands); pitfall trap (12-26); F. Verheyde det.

THE NETHERLANDS: • 1 ♀; Windesheim , Landgoed (OR); 52°26’48”N 6°07’28”E; 1/ix/2015; G. Beersma leg.; field observation; F. Verheyde det. (ObsID: 106848997) • 1 ♀; Hardenberg (OR); 52°35’28”N 6°31’54”E; 4/xi/2015; J. de Gooijer leg.; field observation; F. Verheyde det. (ObsID: 110350077) . • 1 ♀; Oosterwolde (FR); 52°59’45”N 6°17’51”E; 2/ix/2019; R. J. van der Leij leg.; field observation; F. Verheyde det. (ObsID: 179604966) . • 1 ♀; Vaals , Vijlenerbos (LIN); 50°46’48”N 5°56’42”E; 21/v/2020; S. Lamberts & A. Wijker leg.; field observation; F. Verheyde det. (ObsID: 201035790) . • 1 ♀; Amerongen , Amerongse Bos (UT) ; 52°00’12”N 5°28’14”E; 25/viii/2020; A. Kreffer & G. van Poelgeest leg.; field observation; F. Verheyde det. (ObsID: 199119552) .