Labus de Saussure, 1867

Pannure, Arati & Carpenter, James M., 2016, Taxonomic studies on potter wasps (Hymenoptera: Vespidae: Eumeninae) of south India, Zootaxa 4171 (1), pp. 1-50 : 32

Genus Labus de Saussure, 1867

Labus de Saussure 1867: 3 , genus (2 species). Type species: Labus spiniger de Saussure, 1867 , by subsequent designation ( Bingham 1897: 348).

Labus: Girish Kumar et al. 2013c: 29–30 .

Diagnosis. Closely related to genus Cyrtolabulus van der Vecht. Mandibles short, stout and wider apically, tip of mandibles cross each other. Clypeus wider than long, generally emarginate apically. Female with distinct subcircular fovea on frons in front of median ocellus ( Fig. 3 ). Cephalic foveae absent. Vertex not sloping behind ocelli. Mesosoma more or less flattened dorso-ventrally, distinctly longer than high. Anterior face of pronotum without medial pits or foveae. Pronotal carina usually not complete. Pronotum produced at humeri. Pretegula carina present, weakly developed. Epicnemial carina absent. Notauli absent. Tegula as long as wide, posterior margin reaches end of parategula ( Fig. 34 ). Metanotum dentiform ( Fig. 49 ). Axillary fossa wide. Propodeal dorsum below plane of metanotum. Superior carina absent. Propodeal orifice wide dorsally. Submarginal carina produced as pointed process above valvula, propodeal valvula free from submarginal carina posteriorly ( Fig. 41 ). Metasoma petiolate, T1 punctate, swollen in apical half ( Fig. 66 ). T2 and S2 apically lamellate. S1 abruptly widening near apex, forming a posterior crescentic sclerite, lateral margins of T1 closely approaching each other ventrally, usually fused. Mid tibia with one apical spur. SMC2 basally truncate ( Fig. 55 ). Prestigma shorter than pterostigma. ♂: F11 hook like, rounded apically; F10 shorter than previous ones; apical flagellomeres without cavity on inner margin but sometime a shallow groove present on it. Body length usually 10–12 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.

FIGURES 48 – 54. 48, Antepipona sp.; 49, Labus pusillus. 50, Anterhynchium mellyi. 51, Subancistrocerus sichelii; 52, Parancistrocerus sp.; 53, Pseudonortonia sp.; 54, Lissodynerus s. septemfasciatus. 48, 49. Posterior surface of mesosoma. 50. Posterior surface of propodeum. 51 – 54. T 1.

FIGURES 37 – 47. Posterior surface of propodeum. 37, 38, Zethus ceylonicus; 39, 40, Discoelius sp.; 41, Labus pusillus; 42, Pareumenes brevirostratus; 43, Stenodyneriellus wickwari. 44, Discoelius sp.; 45, Pareumenes brevirostratus; 46, Rhynchium carnaticum; 47, Anterhynchium mellyi. 44 – 47. Legs.

FIGURES 64 – 73. Metasoma. 64, 69, 73, Delta conoideum; 65, Phimenes flavopictus; 66, Labus pusillus; 67, Cyrtolabulus suavis; 68, 72, Eumenes architectus; 70, Discoelius sp.; 71, Coeleumenes i. impavidus.

FIGURES 55 – 63. Fore wing. 55, Labus pusillus; 56, Pareumenes brevirostratus; 57, Coeleumenes i. impavidus; 58, Phimenes flavopictus; 59, Oreumenoides edwardsii; 60, Allorhynchium argentatum; 61, Rhynchium carnaticum, 62, Alastor abditus; 63, Epsilon chikmagalurensis.