Xenorhynchium van der Vecht, 1963

Pannure, Arati & Carpenter, James M., 2016, Taxonomic studies on potter wasps (Hymenoptera: Vespidae: Eumeninae) of south India, Zootaxa 4171 (1), pp. 1-50 : 41

Genus Xenorhynchium van der Vecht, 1963

Xenorhynchium van der Vecht 1963: 111 . Type species: Vespa nitidula Fabricius, 1798 , by original designation.

Diagnosis. Mandibles long and slender, with teeth absent or inconspicuous. Clypeus longer than wide, emarginate apically. Cephalic fovea absent ( Fig. 8 ). Vertex not sloping behind ocelli. Pronotum angular at humeri/shoulders ( Fig. 8 ). Pronotum with complete transverse carina, its anterior surface smooth, without median pits. Pretegular carina present. Epicnemial carina well developed. Tegula little longer than wide, emarginate adjoining parategula exceeds posterior end of parategula ( Fig. 32 ). Notauli absent. Axillary fossa wide ( Fig. 32 ). Median part of postscutellum strongly raised above level of adjoining areas of propodeum, flattened dorsal surface approximately rectangular and about as long as vertically sloping, or even slightly overhanging, posterior surface ( Fig. 32 ). Propodeum with prominent lateral angles, concave declivity rather sharply separated from the dorsal and lateral areas ( Fig. 32 ). Dorsal furrow present on propodeum anteriorly. Superior carina present dorsally. Propodeal valvula and submarginal carina not free posteriorly. Metasoma sessile, T1 as wide as T2, wider than long. T2 and T3 with a smooth and shiny depressed apical margin. SMC2 basally acute. Prestigma more than half length of pterostigma. Mid tibia with one spur. Ƌ: F11 hook like, rounded apically; F10 shorter than previous ones; no cavity on inner margin. Body length usually 15–20 mm.

Distribution. Oriental Region.

Figures

FIGURES 1 – 12. Head, frontal view. 1, Eumenes architectus; 2, Phimenes flavopictus; 3, Labus pusillus; 4, Antepipona sp.; 5, Pareumenes brevirostratus; 6, Coeleumenes i. impavidus; 7, Anterhynchium mellyi; 8, Xenorhynchium nitidulum; 9, P. flavopictus; 10, Oreumenoides edwardsii; 11, Zethus ceylonicus; 12, Delta e. esuriens. 9 – 12. ♂

FIGURES 31 – 36. Mesosoma, dorsal view. 31, Knemodynerus coriaceus; 32, Xenorhynchium nitidulum; 33, Antepipona sp.; 34, Labus pusillus; 35, Cyrtolabulus suavis; 36, Stenodyneriellus wickwari.