Nematopodius debilis (Ratzeburg, 1852)

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 : 61

Nematopodius debilis (Ratzeburg, 1852) (Fig. 28)

This small genus can be recognised by its small closed areolet and its cylindrical petiole dorsally ( TOWNES, 1970a). The species are very slender and hard to be confused with any other genus within Cryptini .

N. debilis appears to be slightly more common than subsequent species. Its pronotum is black dorsolaterally (without white; see Fig. 28) and its nervellus is broken in the middle (HORSTMANN, 1989). Known hosts are crabronid wasps ( Crabronidae ) of the genus Trypoxylon .

First report of the species and the genus for the Netherlands; confirmed Belgium.

MATERIAL EXAMINED:

BELGIUM: • 2 ♀♀; Roborst (OVL); 50°52’00”N 3°45’25”E; 11/vi/2020; F. Walraet leg.; field observation; F. Verheyde det. (ObsID: 193808199) .

THE NETHERLANDS: • 1 ♀; Zoetermeer, Westerpark (ZH); 52°03’27”N 4°27’05”E; 17/vi/2020; A. van Berge-Henegouwen leg.; field observation; O. Varga det. (ObsID: 194645183); Fig. 28. • 1 ♀; Almere, Wilgenbos (FL); 52°25’11”N 5°13’59”E; 21/vii/2020; P. Hoekstra leg.; coll. PH; field observation on dead Salix alba with many Trypoxylon nests; P. Hoekstra det. (ObsID: 197267704).