Diaparsis (Diaparsis) heterocoloides Khalaim, 2022

Khalaim, A. I., 2022, Two new species of Tersilochinae from Madagascar (Hymenoptera: Ichneumonidae: Tersilochinae), Russian Entomological Journal 31 (2), pp. 163-167 : 165-167

Diaparsis (Diaparsis) heterocoloides Khalaim , sp.n.

Figs 1–9 .

MATERIAL EXAMINED. Holotype: ♀ ( MNHN), Madagascar, [Vakinankaratra Reg.] Ankaratra [Volcano Range], 1800 m, XII.1937,coll, A.Seyrig, “28”, “ Telcocrypta telescopica ankaratrana Srg. TYPE” ( Fig. 2 ).

COMPARISON. Diaparsis heterocoloides sp.n. is very similar to D. demeter sp.n. but differs from this species by the colour pattern of mesosoma ( Fig. 5 ), virtually absent notaulus ( Figs 3, 5 ), shallow and not reaching the epicnemial carina anteriorly foveate groove of mesopleuron ( Fig. 5 ), and mandible with upper tooth about twice as long as the lower tooth.

DESCRIPTION. Female. Body length 8.4 mm. Fore wing length 5.3 mm.

Head with gena roundly constricted posterior to eyes ( Fig. 3 ); gena in dorsal view 0.65 times as long as eye width. Clypeus ( Fig. 4 ) large, lenticular, 2.4 times as broad as long, smooth, with fine and rather dense punctures in upper 0.7, separated from face by weak and broad impression. Mandible moderately slender, weakly constricted in basal half, with lower tooth twice as long as the upper tooth. Malar space about 0.9 times as long as basal mandibular width. Flagellum with 28 flagellomeres, slightly tapered towards apex ( Fig. 6); subbasal flagellomeres about 1.5 times, median flagellomeres 1.3 times as long as broad, and subapical flagellomeres slightly elongate to square; flagellomeres 3 to 7 bearing subapical finger-shaped structures on outer surface. Face with weak median swelling. Face and frons with fine dense punctures on finely granulate and dull background; punctures indistinct peripherally because of granulation. Vertex subpolished, weakly shining, with very fine dense punctures. Gena with fine and sparse punctures on smooth background. Occipital carina complete, evenly convex mediodorsally.

Mesoscutum shallowly granulate to subpolished, weakly shining, finely and densely punctate. Notaulus with weak impression distant from anterolateral margin and very weak (vestigial) wrinkes (or single longitudinal wrinkle) in this impression ( Fig. 5 ). Scutellum with lateral longitudinal carinae present at its anterior 0.2. Upper end of epicnemial carina abruptly curved to reach front margin of mesopleuron at level of lower 0.3 of pronotum ( Fig. 5 ). Foveate groove of mesopleuron shallow, broad, situated in centre of mesopleuron, with weak transverse wrinkles ( Fig. 5 ). Mesopleuron densely punctate on smooth background, peripherally finely granulate or scabrous, with large impunctate area in centre (above foveate groove) ( Fig. 5 ). Propodeal spiracle separated from pleural carina by 2.0 times diameter of spiracle ( Fig. 5 ). Propodeum with dorsolateral areas finely punctate on nearly smooth background; basal keel 0.3 times as long as apical area ( Fig. 7). Apical area flat, uneven, weakly shining; apical longitudinal carinae strong, complete, reaching transverse carina anteriorly ( Fig. 7).

Fore wing with second recurrent vein (2m-cu) postfurcal. First abscissa of radius (Rs+2r) straight, much longer than width of pterostigma. First and second sections of radius (Rs+2r and Rs) meeting at slightly acute angle. Intercubitus (2rs-m) thickened, longer than abscissa of cubitus between intercubitus and second recurrent vein (abscissa of M between 2rs-m and 2m-cu). Metacarpus (R1) almost reaching tip of the wing. Hind wing with nervellus (cu1&cu-a) weakly reclivous. Legs slender, tarsal claws not pectinate.

Metasoma unusually long, posterior to second tergite strongly compressed laterally ( Fig. 1 ). First tergite very slen- der, about 5.6 times as long as posteriorly broad, round in central cross-section, smooth dorsally and with fine longitudinal striae laterally before glymma ( Fig. 8); glymma small, situated at posterior 0.55 of tergite ( Fig. 8); in dorsal view, petiole with lateral margins subparallel, postpetiole widened anteriorly and distinctly broader than petiole; upper margin of first tergite, in lateral view, nearly straight in anterior 0.7 and weakly arcuate in posterior 0.3 ( Fig. 8). Second tergite about 4.0 times as long as anteriorly broad. Thyridial depression very long, reaching almost 0.5 of second tergite, with posterior end pointed. Ovipositor slender and exceptionally long (longer than body), evenly bent upwards, with a slight dorsal subapical swelling ( Fig. 9).

Head black, lower 1/3 of clypeus yellowish brown. Mouthparts and mandibles (teeth dark red) brownish yellow. Antenna brownish black; flagellum slightly paler basally; scape and pedicel with apical margins yellowish ( Fig. 6). Mesosoma reddish orange with upper part of pronotum darkened, and scutellum, postscutellum and propodeum black ( Fig. 5 ). Tegula yellow. Pterostigma pale brown with basal and apical pale spots. Fore and mid legs brownish yellow, mid coxa and distal end of mid femur darkened with reddish orange. Hind leg predominantly reddish orange to brown (tarsus infiscate), with trochanter, trochantellus and base of femur brownish yellow ( Fig. 1 ). First metasomal tergite dark reddish black. Metasoma posterior to first tergite predominantly orange-brown to brown, yellowish ventrally; tergites 2 and 3 dorsally brown to dark brown, posteriorly with transverse brownish yellow band ( Fig. 1 ).

Male. Unknown.

ETYMOLOGY. The new species is named after its similarity to the tersilochine genus Heterocola Förster, 1869 .

DISTRIBUTION. Madagascar.

Figures

Figs 1–5. Diaparsis heterocoloides sp.n., female, holotype: 1 — habitus (without apex of ovipositor); 2 — holotype labels; 3–4 — head; 5 — head and mesosoma; 1, 5 — lateral view; 3 — dorsal view; 4 — front view. Рис. 1–5. Diaparsis heterocoloides sp.n., самка, голотип: 1 — габитус (беЗ верШины Яйцеклада); 2 — Этикетки голотипа; 3–4 — голова; 5 — голова и меЗосома; 1, 5 — сбоку; 3 — сверху; 4 — спереди.