Epirhyssa migratoria Seyrig, 1932

Rousse, Pascal & Noort, Simon Van, 2014, A review of the Afrotropical Rhyssinae (Hymenoptera: Ichneumonidae) with the descriptions of five new species, European Journal of Taxonomy 91, pp. 1-42 : 23-25

Epirhyssa migratoria Seyrig, 1932

Fig. 6

Diagnosis

Bright yellow overall with isolated dorsal black markings; wings hyaline, slightly infuscate apically; face sparsely punctate, almost flat; clypeus nearly smooth, with median and lateral subapical tubercles moderate, ventral margin produced laterally; frons smooth, with two submedian carinae diverging below median ocellus toward lateral ocelli; antenna with 36 flagellomeres; epicnemial carina laterally absent; subtegular ridge convex; fore wing with 2m–cu slightly apical to rs–m; tergite 1 weakly slender in female, much more slender in male; tergites 1–3 smooth, following tergites sparsely punctate with basal transverse striations; apical margins of tergites 3–5 moderately concave. CT 2.5; ML 0.6; POL 2.6; OOL 1.3; Fl 1 4.4; Fl 15 2.3; Fl 35 1.1; T1 1.4–1.5; OT 5.0.

Differential diagnosis

A mostly bright yellow species with hyaline wings, otherwise characterized by the combination of the flat and sparsely punctate face, the pair of submedian carinae on the frons and the absence of the epicnemial carina on the mesopleuron. The lateral part of the epicnemial carina is distinct in every other yellow species with hyaline wings.

Material examined

Lectotype

MADAGASCAR: ♀, Rogez [48°18’ S 48°32’ E], Sep. 30, A. Seyrig, MNHN EY 8815.

Paratypes

3 ♂♂, same label data.

Description

Female (holotype)

B 18.2; A 15.1; L 14.7.

COLOR. Bright yellow overall with infuscate to black markings: mandible, inter-ocellar area (macula connected to eye margin), dorsal margin of occiput, mesoscutal lobes mid-longitudinally, and scutoscutellar groove; antenna and ovipositor sheath mostly dark brown; wings nearly hyaline, apically slightly infuscate, venation testaceous.

HEAD. Face sparsely punctate, almost flat; clypeus smoothly sculptured with moderate lateral and median subapical tubercles, ventral margin moderately produced laterally; mandible stout; upper head quite smooth to moderately and shallowly punctate, inter-ocellar area somewhat rugose; frons with a pair of submedian carinae, carinae abruptly diverging below median ocellus and following anterior margin of vertex, inner margins of toruli hardly produced backwards; occipital carina mid-dorsally interrupted; antenna with 36 flagellomeres.

MESOSOMA. Mesosoma shallowly and moderately densely punctate, but mesonotum transversely striate and anterior half of pronotum smooth; epomia weak; epicnemial carina absent except for a short ventral remnant; apex of subtegular ridge convex, not flanged laterally; submetapleural carina strong and even all along.

WINGS. Fore wing with 2m–cu slightly apical to rs–m, cu–a slightly apical to Rs&M, and Rs moderately bowed forwards; hind wing with distal abscissa of Cu joining Cu&cu–a close to junction with M.

METASOMA. Tergite 1 moderately slender; tergites 1–3 smooth, following tergites finely and sparsely punctate with basal transverse striations; apical margins of tergites 3–5 moderately concave, others straight.

Male (3 specimens)

B 17.5–18.2; A14.3–14.9; L 14.0–14.5.

Similar to female but metasoma much more slender (T1 2.0–2.2).

Distribution

Madagascar.

Figures

Fig. 6. Epirhyssa migratoria Seyrig, 1932, holotype, ♀. A. Habitus, lateral view (inset: data labels). B. Mesosoma, lateral view. C. Metasoma, dorsal view. D. Head, anterior view. E. Mandibles, anterior view.