Lissonota pleuralis Brischke, 1880

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 : 31-32

Lissonota pleuralis Brischke, 1880 (Fig. 7 A–B)

= syn. L. strigifrons Schmiedeknecht, 1900

Lissonota pleuralis has a striking appearance. Both sexes have white or yellow tegulae, in combination with a yellow clypeus and pair of mandibles. The females have reddish patches on their mesopleuron and metapleuron. Their scutellum is also reddish. Next to the two lateral ocelli (on frons/vertex) there is a rather large triangular yellow spot, and sometimes there are yellow markings on the cheeks. The other parts of the head and the mesosoma (incl. mesonotum) are black and rather evenly punctuated on a matt surface (Fig. 7 A). The males are predominantly yellow. Their face, clypeus, frontal orbits and scutellum are completely yellow. Their pronotum (incl. pronotal collar), mesopleuron and metapleuron have yellow markings. Usually the upper part of the mesopleuron has a red to red brown stripe. Sometimes the mesoscutum also has red brown markings. The antennae are orange, at least ventrally. Their metasoma is black with the apical borders yellow. Their legs are predominantly orange or red (Fig. 7 B). The body length in our specimens is 7–9 mm for the males and 9–10 mm for the females. Despite these features, it is necessary to check this species with a microscope to distinguish it from L. bivittata Gravenhorst, 1829 (especially ssp. - gallicator, with black mesonotum) which does not have its second and third tergite evenly and densely punctuated ( KUSLITZKY, 1981). Therefore, we cannot assess the presence of the species in the Netherlands with complete certainty, although it is highly probable taking the distribution and ecology of both species in mind (see for example ObsID 196467195). The only known host is the rare lepidopteran Eudonia lineola (Curtis, 1827) ( Lepidoptera : Crambidae ). This explains the local distribution of the findings, which are all situated in coastal areas.

First report for Belgium; unreported in the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♂; Oostduinkerke , Schipgatduinen (WVL); 51°07’50”N 2°39’31”E; 18/vii/2017; P. Vanhauwere leg. [UGent]; coll. KBIN/RBINS (ENDURE-project, 150_ODK_BAD_15_M); field observation; F. Verheyde det. • 1 ♂; Knokke , De Haan , Duinbossen Wenduine / De Haan (WVL); 51°17’14”N 3°03’03”E; 21/vii/2017; P. Vanhauwere leg. [UGent]; coll. KBIN/RBINS (ENDURE-project, 176_DHN_K_15_N); field observation; F. Verheyde det. • 1 ♂; Knokke , Het Zwin - Zwinbosjes (WVL); 51°21’49”N 3°20’30”E; 25/vii/2017; P. Vanhauwere leg. [UGent]; coll. KBIN/RBINS (ENDURE-project, 203_ZWN2_8_N); field observation; F. Verheyde det. ; Fig. 7 A . • 1 ♀; Oostende , Duinen Fort Napoleon (WVL); 51°14’26”N 2°56’11”E; 22/vii/2020; E. Devos & F. Verheyde leg.; coll. FV; field observation; A. De Ketelaere, T. Robert & F. Verheyde det. (ObsID: 196821118) . • 1 ♀; Wenduine , Duinbossen Wenduine / De Haan (WVL); 51°17’44”N 3°04’06”E; 26/vii/2020; A. De Ketelaere leg.; coll. ADK; field observation; T. Robert & A. De Ketelaere det. (ObsID: 205393239) ; Fig. 7 B .