Xorides csikii (Clement, 1938)

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 : 131

Xorides csikii (Clement, 1938)

With a body length of 4 to 5 mm, X. csikii is a very small wasp in the genus. Its head, mesosoma and first tergite of the metasoma are black, the remaining part red. The females have their subapical antennal segments 13–16 swollen, making an indistinct club with a total of 4–6 stout erect setae ( VARGA, 2014). Its pterostigma is short and wide (about 3x as long as wide) and often bicoloured: basally white, apically black. The species seems to be rather uncommon, but not rare. First report for Belgium and the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Boom , De Schorre (AN); 51°05’14”N 4°23’16”E; 7/v/2019; Y. Callaert leg.; field observation; F. Verheyde det. (ObsID: 171781041) . • 1 ♀; Beersel , Begijnenbos (VB); 50°44’28”N 4°17’22”E; 7/v/2020; L. Decrick leg.; field observation of a dead specimen; F. Verheyde det. (ObsID: 191115899) . • 1 ♀; Ieper (WVL); 50°51’15”N 2°51’51”E; 11/v/2020; M. Willems leg.; field observation; F. Verheyde det. (ObsID: 191364768) .

THE NETHERLANDS: • 1 ♀; Arnhem (GE); 51°57’14”N 5°51’09”E; 18/iv/2019; B. Schoenmakers leg.; field observation; W. Pénigot & F. Verheyde det. (ObsID: 170925226). • 1 ♀; Eindhoven, Stratumse Heide (NB); 51°24’39”N 5°30’07”E; 17/iv/2020; R. Aussems leg.; field observation; F. Verheyde det. (ObsID: 189244105). • 1 ♀; Tilburg, Leijbos (NB); 51°32’34”N 5°00’51”E; 23/iv/2020; KNNV Tilburg leg.; coll . PH; malaise trap; P. Hoekstra det. (ObsID: 205272898). • 1 ♂ 1 ♀; Udenhout , de Brand (NB); 51°37’55”N 5°08’00”E; 25/iv/2020; KNNV Tilburg leg.; coll . PH; malaise trap (19-25); P. Hoekstra det. (ObsID: 210729367) .