Gasteruption nigritarse (Thomson, 1883) Figs 174-175, 176-187, 188, 189-194

Foenus nigritarsis Thomson, 1883: 849; Schletterer 1889: 398; Hedicke 1939: 7; Hedqvist 1973: 181, 182 (lectotype designation); Wall 1994: 149. Synonymised with G. assectator (Linnaeus) by Schletterer (1889).

Gasteruption nigritarse; Schletterer 1885: 310; Johansson and van Achterberg 2016: 84-86; Orlovskytė et al. 2018: 123.

Type material.

The female lectotype from Lund (Scania, S Sweden) was selected by Hedqvist (1973). All 12 specimens (both males and females) of the series under Foenus nigritarsis in ZIL (including the lectotype by Hedqvist) belong to the same distinct species (Johansson and van Achterberg 2016).

Additional material.

3 ♀ (NWUX), NW China: Shaanxi, Qiligou, Xunyangba, 507 m alt, 1.vii.2019, 32°91'N, 109°68'E, hand net, Tan JL ; 1 ♀ + 1 ♂ (RMNH), NW China: Shaanxi, NWU Taibai campus, ca. 410 m alt., 34°15'N, 108°55'E, small garden, on flowers of Cayratia japonica (Thunberg), 4.viii.2017, C. v. Achterberg ; 2 ♀, NWU Chang’an campus, on flowers of Daucus carota L. 30.vi.2020, JL Tan ; 1 ♀ (NWUX), "NW China: Gansu, Lianjiabian, Taibai Heshui, sweep net, 36.06°N, 108.54°E, 8.viii.2019, alt. 1193 m, Ruonan Zhang, NWUX" ; 4 ♀ (NWUX, RMNH), "NW China: Shaanxi, Xialiangzhen, Zhashui, Shangluo, sweep net, alt. 1059 m, Ruonan Zhang, NWUX" .

Distribution.

Europe; China (Gansu, Shaanxi). Collecting a couple of this species in the small NWU garden (at the Taibai campus in the very centre of Xi’an) on bush-killer, Cayratia japonica (Thunb.) Gagnep. was a real surprise. New for China, Gansu, Shaanxi and even for the East Palaearctic Region.

Notes.

The Chinese specimens have the temple slightly longer than in European specimens (the eye/temple ratio is the same in the examined specimens) and the hind tibia is slightly more inflated. Both are likely part of clinal variation and, therefore, the Chinese specimens are considered to be conspecific.