Dolichomitus excavatus Zwakhals, 2010

Choi, Jin-Kyung, Kolarov, Janko, Jeong, Jong-Chul & Lee, Jong-Wook, 2016, A taxonomic review of the genus Dolichomitus Smith (Hymenoptera: Ichneumonidae: Pimplinae) from South Korea with descriptions of two new species, Zootaxa 4132 (2), pp. 235-253 : 240-242

Dolichomitus excavatus Zwakhals, 2010

( Figs 1–11 )

Dolichomitus excavatus Zwakhals, 2010: 124 . Type: male; TD: ZSM.

Description of male. Male. Fore wing 9.0 mm, body 14.5 mm.

Color. Black. Ventral part of antennal scape, palpi and tegula pale yellow. Clypeus brown. Fore and mid legs yellowish brown; all trochanter paler. Hind leg brown except for tibia to tarsus dark brown. Pterostigma yellowish brown. Metasoma dark brown with darkened band apically.

Head: Face densely punctate with long silver hairs ( Fig. 3 ), distance between punctures almost as long as their diameter; face 1.3 × as wide as distance between below antennal socket and above clypeus. Clypeus separated from face by transverse carina; margin of clypeus concave; clypeus 2.6 × as wide as high. Mandible with equal length teeth. Malar space with fine sculpture, 0.2 × as long as basal width of base of mandible. Frons weakly excavated above base of antennae; frons with fine and sparse punctures; vertex sparsely punctate. Diameter of lateral ocellus 0.87 × as long as shortest distance between lateral ocellus and eye. Distance between lateral ocellus and occipital carina about 1.9 × as long as diameter of lateral ocellus. Antenna with 25 + flagellomeres; first flagellomere 3.6 × as long as wide. Temple shiny, distance of temple shorter than transversal diameter of eye in lateral view.

Mesosoma: Mesosoma covered with long silver hairs. Pronotum strongly depressed, upper part of pronotum sparsely punctate; epomia absent. Mesoscutum densely punctate; middle lobe of mesoscutum forms surface an angle less than 90º. Notaulus deep. Epicnemial carina weak, reaching middle of front ridge of mesopleuron. Prepectus densely punctured; mesopleuron with moderately dense punctures. Speculum area concave and glabrous. Mesepimeron glabrous. Scutellum weakly convex, with fine and very sparse punctures, without lateral carinae. Propodeum rugosely punctate, with median longitudinal carinae, slightly transversally striated in apical half. Propodeal spiracle round, closer to pleural carina. Submetapleural carina present. Legs slender. Mid coxa with short, broad tooth and deep excavation on dorso-lateral part ( Fig. 9 ). Hind femur 5.3 × as long as wide. Correlation length of hind tarsal segments as 26:12:9:4:11. Fore wing with areolet; nervulus opposite to basal vein. Nervellus of hind wing intercepted above middle ( Fig. 11 ). Hind wing with seven distal hamuli.

Metasoma: First tergite rugosely punctate, 2.0 × as long as wide at apex; second tergite 2.1 × as long as wide ( Fig. 10 ). Lateral part of first tergite rather coarse and rugose. Second tergite with oblique groove that runs from base near the midline toward the spiracle. Fourth to fifth tergites without lateral swellings. Apex of second to fifth tergites with polished band.

Material examined. [ South Korea] 1♂, Mt. Chonggyesan, GG, 25.vi.1984, J.W.Lee; 1♂, Toachon-myeon, Gwangju-si, GG, 17.iv.2014, H.Y.Oh.

Distribution. South Korea (new record), Germany.

Region. Eastern Palaearctic (new record), Western Palaearctic.

Host. Epiglenea comes Bates ( Coleoptera : Cerambycidae ) (New record from South Korea).

Figures

FIGURES 1 – 7. Dolichomitus excavatus Zwakhals, (1) Habitus in lateral view, (2) Habitus in dorsal view, (3) Head in frontal view, (4) Head in lateral view, (5) Tarsal claw, (6) Mesosoma in lateral view, (7) Head and mesoscutum in dorsal view. Scale bars (1,2): 2 mm, (6,7): 0.5 mm, (3,4): 0.2 mm, (5): 0.1 mm.

FIGURES 8 – 11. Dolichomitus excavatus Zwakhals, (8) Scutellum and propodeum, (9) Mid coxa, (10) First to third tergites in dorsal view, (11) Wings. Scale bars (11): 1 mm, (8,10): 0.5 mm, (9): 0.2 mm.