Leptochilus (Lionotulus) argentifrons (Kostylev, 1935)

Bai, Yue, Chen, Bin & Li, Ting-Jing, 2024, A newly recorded genus Microdynerus Thomson, 1874 and a review of its related genus Leptochilus de Saussure, 1853 (Hymenoptera, Vespidae, Eumeninae) from China, Journal of Hymenoptera Research 97, pp. 57-83 : 57

Leptochilus (Lionotulus) argentifrons (Kostylev, 1935)

Figs 10-16

Microdynerus argentifrons Kostylev, 1934: 137; Kostylev 1940: 37; van der Vecht and Fischer 1972: 45.

Material examined.

1♂, China, Xinjiang, Bayinguoleng Mongolian Autonomous Prefecture , Ruoqiang County, 14.V.2010, Zhaohui Luo (CNU) .

Diagnosis.

Female body length 5.0 mm; male body length 4.5 mm, forewing 4.3 mm (Fig. 10 ); body with small and sparse punctures, interspaces between punctures polished (Fig. 10 ); with obvious white setae; black, with the following parts yellow: clypeus, scape, flagellum except dorsally, pronotum, tegula, parategula, scutellum at posterior half, posterodorsal spot of mesopleuron, legs (except basal margins of femora), mostly on apical margin of T1, wide band in the part middle area of T2, lateral spot of S2, apical bands of metasomal segments 2-5. In front view, frons with dense setae (Fig. 11 ); clypeus wider than long, apically with deep emargination in male, and emargination wider than depth (1.8 ×); A13 sharp at the apex (Fig. 12 ); ocelli large; occipital carina curved latero-ventrally. Pronotal carina obvious (Fig. 13 ); propodeum smooth (Fig. 14 ), with boundary between dorsal and posterior surfaces, but without carina; propodeal carina present inn lower half, and less than 1/2 of propodeal concavity. Metasomal segments 2-4 with wide apical lamellae and the second metasomal segment with a row of great punctures at base, interspaces between punctures short carina-formed (Fig. 15 ); S2 weak convex in lateral view, with shallow and short longitudinal medial furrows at base (Fig. 16 ).

Distribution.

China (new record: Xinjiang), Turkmenistan.

Figures

Figures 10 - 16. Leptochilus (Lionotulus) argentifrons (Kostylev, 1935) ♂ 10 habitus in dorsal view 11 head in frontal view 12 part of antenna 13 vertex and pronotum 14 propodeum in posterior view 15, 16 metasoma in lateral view.