Casinaria albipalpis (Gravenhorst, 1829)

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 : 36

Casinaria albipalpis (Gravenhorst, 1829) (Fig. 9A–B)

Superficially, Casinaria spp. resemble Dusona spp. , but belonging to the (former) tribe of Campoplegini the suture on the first tergite is always present, usually at or above mid-height of this segment. Specific for this genus is the shape of the areolet, with 2m-cu meeting CU (distal corner of second discal cell) at an acute angle ( TOWNES, 1970b).

Overall, this species is black with yellow to white mandibles (Fig. 9 B), tegulae, fore and mid trochanters/trochantelli. The legs are reddish, with the hind tibiae ivory basally and externomedially ( RIEDEL, 2018; see Fig. 9 A). This species can be regarded as ‘opportunistic’ with a wide host range and phenology (from April to September). It is widely distributed in western Continental Europe (see FAUNA EUROPAEA) and is just waiting to be found in Belgium. Most of the collected specimens were caught with light traps, and all of them were found within an urban context. Host records are uncertain at this moment.

First report for the Netherlands; unreported in Belgium.

MATERIAL EXAMINED:

THE NETHERLANDS: • 1 ♂; Drachten (FR); 53°05’59”N 6°06’32”E; 18/ix/2019; H. Meijer leg.; coll. HM; light trap; H. Meijer det. • 1 ♀; Almere (FL); 52°22’48”N 5°14’19”E; 26/iv/2020; P. Hoekstra leg.; coll . PH; field observation, flying around Chamaecyparis lawsoniana shrubs; P. Hoekstra det. (ObsID: 190092733); Fig. 9A-B. • 1 ♂; Drachten (FR); 53°05’59”N 6°06’32”E; 8/v/2020; H. Meijer leg.; coll. HM; light trap; H. Meijer det. • 1 ♂; Drachten (FR); 53°05’59”N 6°06’32”E; 15/viii/2020; H. Meijer leg.; coll. HM; light trap; H. Meijer det. • 1 ♀; Drachten (FR); 53°05’59”N 6°06’32”E; 30/viii/2020; H. Meijer leg.; coll. HM; light trap; H. Meijer det.