Eustenogaster
Creators: name: Saito, Fuki
name: Kojima, Jun-Ichi
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Vespidae
Eustenogaster

description: Genus Eustenogaster van der Vecht
Eustenogaster van der Vecht, in Yoshikawa et al., 1969: 165, as a genus. Type species: Ischnogaster micans de Saussure, 1852, by original designation.
Paravespa Bell, 1936: 803, 806, fig. 1, as a genus. Type species: Paravespa eva Bell, 1936 [= Stenogaster eximioides Dover and Rao, 1922], by subsequent designation of van der Vecht and Carpenter (1990: 44). Junior homonym of Paravespa Radoszkowski, 1886 [Vespidae, Eumeninae].
Large wasps in Stenogastrinae; body length (head + mesosoma + first two metasomal terga) 14–21 mm, forewing length more than 14 mm. Head in frontal view about as wide as high (Figs. 26, 41, 46, 52, 55); eyes enlarged, in lateral view swollen in ventral half (Figs. 6, 36, 42, 47, 51, 53); occipital carina reaching and fused with hypostomal carina; mandible oblong-shaped (Figs. 5, 13, 22, 25, 27, 34). Scutum with notauli present at most as traces, usually obscured by punctation; scutellum strongly convex (Figs. 37, 49), with more or less prominent, median, longitudinal carina; propodeum with very shallow, sparse punctures or smooth-surfaced; propodeal valvula large, rounded (Fig. 1). Second metasomal segment non-petiolate basally (Fig. 30).
Color. Body dark brown to black, with some bright-colored markings.
FIGURES 1–8. 1, Eustenogaster fraterna. 2–5, E. agilis. 6–8, E. fulvipennis.1–4, female. 5–8, male. 1, propodeal valvula (PV), hind coxa (HC) and first metasomal tergum (MTI). 2, ocelli. 3, second metasomal tergum in profile. 4, sixth metasomal tergum in lateral view. 5, mandible. 6, head in lateral view. 7, apical part of clypeus. 8, lateral furrows on pronotum in lateral view. Scale bars show 1 mm.
FIGURES 9–16. 9–14, Eustenogaster fraterna. 15–16, E. nigra. 9–12, female. 13–16, male. 9, ocelli. 10 and 15, first metasomal segment in dorsal view. 12, sixth metasomal tergum in lateral view. 13, mandible. 11 and 14, second metasomal tergum in profile. 16, minute serration of lateral margin of pennies valve. Scale bars show 1 mm except for fig. 16.
Female. Clypeus more or less pointed apically (Figs. 21, 26, 32, 35, 41, 52); anterior ocellus somewhat elliptical, wider than long; posterior ocellus more or less circular (Figs. 2, 9, 29, 43, 54); mandible with three teeth (Figs. 22, 27, 34). Sixth (=terminal) metasomal tergum with tubercle or spine (Figs. 4, 12, 28, 50).
Male. Antenna with terminal flagellomere conical. Length of second maxillary palpomere longer than that of third to sixth palpomeres combined. Metasomal terga with tubercle or spine absent. Genitalia: Parameral spines tapering apically (Fig. 59 A); aedeagus slender, in lateral view slightly dilated apically (Fig. 59 B–M), laterobasally with a pair of projections; volsella longer than wide, bent at anterior margin, with beak-shaped digitus (Fig. 59 N–Y).
description: Published as part of Saito, Fuki & Kojima, Jun-Ichi, 2007, A taxonomic revision of the hover wasp genus Eustenogaster van der Vecht (Insecta: Hymenoptera; Vespidae, Stenogastrinae), pp. 1-30 in Zootaxa 1556 on pages 3-6, DOI: 10.5281/zenodo.178242