Eriborus obscuripes Horstmann, 1987

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 : 40

Eriborus obscuripes Horstmann, 1987 (Fig. 13A–B)

Another genus belonging to the (former) tribe of Porizontini. The hind basitarsus has a continuous, straight, median ventral row of small very closely-spaced hairs. In the hind wing the distal abscissa of CU stops before the nervellus (which is vertical). In contrast to Echthronomas spp. the areolet is absent ( TOWNES, 1970b).

Using the key of HORSTMANN (1987) both specimens clearly keyed as this species (e.g. the entire tarsal claws pectinate, tegulae yellow, temples short and narrowed, ovipositor shorter than petiole; see Fig. 13 A). However, it is with some caution we make this report. In contrast to Horstmann’s original description, the mandibles of both specimens are (completely) yellow (Fig. 13 B). It could thus be an unknown variation or even (sub)species. Hosts are unknown.

First report for Belgium; unreported in the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Westrozebeke , Polderbos (WVL); 50°56’24”N 3°00’35”E; 13/vi/2020; F. Verheyde leg.; coll. FV; field observation; F. Verheyde det. (ObsID: 193950343) . • 1 ♀; Sint-Michiels (WVL); 51°11’44”N 3°13’44”E; 18/ix/2020; A. De Ketelaere leg.; coll. ADK; field observation; A. De Ketelaere & H. Meijer det. (ObsID: 202192182); Fig. 13A–B .