Mesochorus (Mesochorus) semirufus Holmgren, 1860

Riedel, Matthias & Varga, Oleksandr, 2022, A checklist of the subfamily Mesochorinae (Hymenoptera, Ichneumonidae) from the Ukrainian Carpathians, Zootaxa 5100 (2), pp. 224-248 : 242

Mesochorus (Mesochorus) semirufus Holmgren, 1860 ( Fig. 33 )

Material examined. UKRAINE: lvano-Frankivsk Region : 1 ♀, Mochary , 5 km NE of Bogorodchany, 48.505117°N, 24.352691°E, 300–350 m, mixed forest, Malaise trap 5, 5.vii–1.viii.2018 ; 1 ♂, idem, Malaise trap 8, 17.viii.2013 ; 1 ♀, idem, 14–29.ix.2014 ; Transcarpathian Region : 3 ♀♀, Svydovets , 2–3 km NW of Kvasy, 48.090889°N, 24.155835°E, 850–900 m, beech forest, Malaise trap 2, 7.v–5.vi.2014 ; 1 ♀, idem, 24.vi–14.vii.2014 ; 1 ♀, idem, 10.viii–1.ix.2014 ;, 3 ♀♀, Chornogora , 4 km NE of Kvasy, 1000 m, beech forest, sweeping, 16.vi.2013 ; 1 ♀, Chornogora , Sheshul, 6–7 km NE of Kvasy, 1450 m, subalpine zone, Malaise trap 5, 29.vi–18.vii.2014, leg. O. Varga ; 1 ♀, Chornogora , 1500–1600 m, 48.094552°N, 24.245614°E, coniferous forest, sweeping, 7.viii.1994, leg. A. Kotenko ; 1 ♀, Dilove , on light, vii–viii.2008, leg. R. Bidychak ; 1 ♀, 6.5 km N of Mala Ugolka , 48.153958°N, 23.370084°E, 750 m, beech forest, Malaise trap 4, 8.vii–6.viii.2015 ; 1 ♀, idem, Malaise trap 5, 8.vii–6.viii.2015 ; 1 ♀, idem, Malaise trap 6, 8.vii–6.viii.2015, leg. O. Varga ( SIZK) .

Distribution. Palaearctic and Oriental regions; first record for Ukraine

Taxonomical remark. A common and widespread species with mainly black mesosoma (rarely mesoscutum and scutellum with diffuse dark reddish suffusion); reddish or ± brownish face; hind claw with c. 6 strong teeth; densely punctate ventrally mesopleuron; оvipositor sheath 0.85–0.9 × as long as hind metatarsus; yellow hind tibia, infuscate basally and in apical 0.2; and brownish pterostigma.

Figures

FIGURES 32–35. The Carpathian Mesochorus spp. 32—M. rufoniger; 33—M. semirufus; 34—M. testaceus; 35—M. vittator.