Lethades orientalis Reshchikov & Xu

Reshchikov, Alexey, Xu, Zai-fu & Pang, Hong, 2017, First record of the genus Lethades Davis, 1897 from the Oriental region, with description of a new species (Hymenoptera, Ichneumonidae, Ctenopelmatinae), ZooKeys 644, pp. 43-50 : 47-49

Lethades orientalis Reshchikov & Xu sp. n. Figures 1-7

Type material.

Holotype, female, CHINA: Guangdong, Fengkai, Heishiding Provincial Nature Reserve (23°27'N, 111°53'E), 150-927 m., sweep net, 1-2.X.2003, leg. Zaifu Xu (SCAU).

Diagnosis.

This species can be distinguished from all other species of Lethades by a combination of the following characters: metasoma black (Fig. 1); fore wing with areolet; claw distinctly pectinate, teeth of hind claw as high as claw (Fig. 7); longitudinal propodeal carina complete (Fig. 4).

Description.

Female. Body length 10.5 mm.

Head. Face and clypeus shagreened and covered with long reddish setae (Fig. 2). Face approximately 1.4 times as wide as high, with distinct, sparse and shallow punctures; median portion weakly and longitudinally convex (Fig. 2). Clypeus convex, gradually raised towards apical margin, with very sparse, fine and distinct punctures. Upper tooth of mandible obviously shorter than lower tooth. Malar space approximately 0.6 times as long as basal width of mandible. Gena, vertex and frons shagreened. Head with parallel sides behind eyes (Fig. 3). Gena in lateral view approximately as long as the width of eye. Postocellar line nearly 0.5 times as long as ocular-ocellar line. Antenna with 40 flagellomeres. Occipital carina complete.

Mesosoma. Pronotum distinctly punctate. Mesoscutum with dense and distinct punctures. Notauli present. Scuto-scutellar groove with weak longitudinal wrinkles. Scutellum convex, with distinct punctures, its basal 0.3 with lateral carina. Mesopleuron (Fig. 5) and metapleuron coriaceous, mat, densely and distinctly punctate. Epicnemial carina distinct, its upper end reaching middle of mesopleuron. Wings slightly brownish, hyaline (Fig. 1). Fore wing with vein 1cu-a interstitial. Hind wing vein 1-cu approximately 1.9 times as long as cu-a. Hind femur 4.4 times as long as broad at its middle. Ratio of length of hind tarsomeres 37: 14: 11: 6: 16. Claw distinctly pectinate, teeth of hind claw as high as claw (Fig. 7). Propodeum rather short (Fig. 4). Its carinae strongly raised (Fig. 4). Area superomedia and area apicalis fused to form a pentagonal area, costula connecting in front of its middle (Fig. 4). Propodeal spiracle rounded.

Metasoma. Metasomal tergites shagreened, matt, finely punctate. T1 twice as long as apical broad. Dorsal carinae strongly raised, almost reaching posterior margin of T1. T2 transverse. Ovipositor sheath approximately 0.8 times as long as apical depth of metasoma, subapical portion distinctly truncated (Fig. 6). Ovipositor moderately stout, without distinct subapical notch (Fig. 6).

Color. Body mostly black (Figs 1-7). Mandibles, palpi, pedicel and basal part of first flagellomere ventrally, ovipositor sheath reddish. Flagellomeres 10-20 and apical tarsomeres white. Metasomal sternites and legs excluding hind coxa, femur, and distal and proximal parts of tibia reddish-yellow.

Male. Unknown.

Etymology.

The name of the new species refers to the Oriental Region.