Syrphophilus stibarus Momoi, 1397

Klopfstein, Seraina, 2011, A review of the Diplazontinae of Mongolia (Hymenoptera: Ichneumonidae), Zootaxa 2790, pp. 35-53 : 52

Syrphophilus stibarus Momoi, 1397 = Syrphophilus dilleriator Aubert, 1976 , syn. nov.

Syrphophilus stibarus was described from Mongolia based on five individuals. They are conspecific with S. dilleriator from the Alps, which becomes a junior synonym (syn. nov.).

Type material. Lectotype: Mongolia- Bajan-Ölgij aimak, in the valley of the river Chavealyn gol, 25 km E of Somon, Cagannuur, 1850 m, 0 3.07.1968 (1Ψ). Labelling of the lectotype: MONGOLIA: Bajan-Ölgij aimak; im Tal des Flusses Chavea-; lyn gol, 25 km O von Somon; Cagannuur, 1850 m; Exp.Dr.Z.KASZAB,1968 // Nr.1056; 3.VII.1968 // Syrphophilus ; sp.; Det. S. MOMOI,’ // Lectotypus; Syrphophilus Ψ; stibarus Momoi ; label: S.Klopfstein, 2006. Paralectotypes: Ψ and 2ɗ from the same location; Uvs aimak, pass Ulaan davaa, on the eastern slope between lakes Örög nuur and Ulaangom, 1950m, 0 6.07.1968 (1ɗ) (all HNHM).

Diagnosis. This species is close to S. bizonarius (Gravenhorst, 1829) but can be distinguished by its larger size, by the denser and deeper punctuation especially on the mesopleuron, where also the upper half is completely punctured, and on tergites 4 and 5. The sternaulus is distinct, but less deeply impressed. The antennae are shorter in S. stibarus , with 16–17 flagellomeres in the female and 17–18 in the male, compared to 18–21 and 17–20 in S. bizonarius females and males, respectively.