Dyspetes arrogator Heinrich, 1949

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 : 125-126

Dyspetes arrogator Heinrich, 1949 (Fig. 68)

Dyspetes spp. can be very easily identified within Tryphonini because of their unique areolet, which is rhombic, wider than high, with the veins 2r-m and 3r-m of nearly equal length.

The females of D. arrogator are not easily distinguished from D. luteomarginatus Habermehl, 1925 . They are somewhat smaller sometimes and fly earlier in the year (May-July; versus July- September in D. luteomarginatus ), but differences are very small morphologically. The males, however, can be easily identified. They have black hind legs (Fig. 68), which is unique in the genus. Among its hosts are sawflies, e.g. Aglaostigma aucupariae (Klug, 1817) (Symphyta: Tenthredinidae ) (HINZ, 1961; KASPARYAN & TOLKANITZ, 1981; HORSTMANN, 2006b).

First report for Belgium; confirmed in the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Somal (NA); 23/vii/2006; P.-N. Libert leg.; coll. PNL; field observation; D. Kasparyan det. • 1 ♂; Ranst , Bos van Ranst (AN) ; 51°11’55”N 4°33’26”E; 15/v/2012; L. Janssen leg.; field observation; F. Verheyde & W. Pénigot det. (ObsID: 72958909) . • 1 ♂; Rillaar (VB); 50°58’38”N 4°54’04”E; 19/v/2018; E. Van Dyck leg.; field observation; F. Verheyde & W. Pénigot det. (ObsID: 156905265) . • 1 ♂; Waarschot (OVL); 51°09’31”N 3°36’56”E; 16/v/2020; K. Deroose leg.; field observation; F. Verheyde & W. Pénigot det. (ObsID: 191512406).

THE NETHERLANDS: • 1 ♀; Houten (UT); 52°01’47”N 5°08’13”E; 22/v/2018; J. E. Wigboldus leg.; field observation; F. Verheyde det. (ObsID: 157092500) . • 1 ♂; Echt , De Doort (LIN); 51°05’13”N 5°51’43”E; 1/v/2020; A. Wijker leg.; field observation; F. Verheyde det. (ObsID: 201011699); Fig. 68 .