Acrolyta marginata (Bridgman, 1883)

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 : 86

Acrolyta marginata (Bridgman, 1883) (Fig. 45 A–B)

Species within the subtribe Acrolytina can be recognised by the strong but short dorsal longitudinal carinae on their pronotum and the absence of a median apical tooth on their clypeus ( TOWNES, 1970a). Acrolyta spp. are closely related to species from the genus Eudelus but can be distinguished on the basis of the distinctly widened antennae in the middle and the ovipositor tip with distinct teeth ventrally (females) or the incomplete carination on the area superomedia (males) ( SCHWARZ & SHAW, 2000).

A. marginata has a straight clypeus without a tooth (Fig. 45 A), the second tergite basally (0.4) rugose/strigose and both the second and third tergite distinctly sculptured. Its third antennal segment is 4.4-4.6x as long as wide and the third tergite is clearly reddish laterally ( SCHWARZ & SHAW, 2000; Fig. 45 B). It is a known parasitoid of Microgastrinae (Parasitica: Braconidae ).

First report for Belgium; unreported in the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Beernem , Beverhoutsveld (WVL); 51°09’18”N 3°18’34”E; 17/viii/2020; A. De Ketelaere leg.; coll. ADK; field observation; A. De Ketelaere & G. Várkonyi det. (ObsID: 198902055); Fig. 45 A–B .