Mesochorus (Mesochorus) thomsonii Dalla Torre, 1901

Riedel, Matthias & Varga, Oleksandr, 2022, A checklist of the subfamily Mesochorinae (Hymenoptera, Ichneumonidae) from the Ukrainian Carpathians, Zootaxa 5100 (2), pp. 224-248 : 229

Mesochorus (Mesochorus) thomsonii Dalla Torre, 1901 ( Fig. 8 )

syn. Mesochorus nigriceps Thomson, 1886 , preoccupied.

Material examined. UKRAINE: Ivano-Frankivsk Region: 1 ♂, Gorgany, pol. Playek , 1200 m, 48°36‘42.77“N, 24° 09‘10.69“E, sweeping, 11.v.2013 ; Transcarpathian Region: 3 ♀♀, 6.5 km N of Mala Ugolka , 48.153958°N, 23.370084°E, 750 m, beech forest, Malaise trap 6, 12–31.v.2015, leg. O. Varga ( SIZK) .

Distribution. Europe; first record for Ukraine.

Taxonomical remark. This species has been usually synonymized with Mesochorus punctipleuris in the past ( Horstmann 2002: 87), but was recently re-established as a separate species ( Riedel & Kolarov 2021). It differs from M. punctipleuris by the longer and sharper teeth of the hind tarsal claw; brown to blackish mid coxa; infuscate basally and apically hind tibia; and longer ovipositor sheath (1.00–1.05× as long as hind metatarsus).

Figures

FIGURES 7–10. The Carpathian Mesochorus spp. 7—M. punctipleuris; 8—M. thomsonii; 9—M. politus; 10—M. discitergus.