Ortholaba laevis, Sun, Shu-Ping & Sheng, Mao-Ling, 2006

Sun, Shu-Ping & Sheng, Mao-Ling, 2006, The genus Ortholaba (Hymenoptera: Ichneumonidae: Diacritinae) with description of a new species, Zootaxa 1340, pp. 51-55 : 52-53

Ortholaba laevis , sp. nov.

( Figs. 1–3 )

Diagnosis. The new species can be distinguished from O. tenuis by any of the following characters: apical half of clypeus darkish red. Mandible (except the apical tooth), front and middle coxae yellowish brown. Hind coxa, trochanter and femur extensively reddish brown. Face with very sparse, fine and indistinct punctures. Propodeum with a distinct median longitudinal groove.

Description. Female. Body length 11–11.2 mm. Forewing length 8–8.2 mm. Ovipositor sheath length 13–13.5 mm.

Head. Face about 1.4X as wide as long, smooth, with very sparse, fine and indistinct punctures. Median portion of clypeus strongly convex transversely, smooth and shining, basal half with very sparse and weak punctures. Mandible with yellowish brown hairs. Cheek with fine granular surface. Malar space about 0.4X as long as basal width of mandible. Temple and vertex smooth and shining, with very sparse and fine punctures. Postocellar line 0.6–0.7X as long as ocular­ocellar line, hind median portion of vertex, above occipital carina, weakly depressed. Frons smooth and shining, lower lateral portion weakly concave, upper median portion weakly convex. Occipital carina complete and very strong. Antenna with 27 flagellomeres, first flagellomere 1.4X longer than second, second 1.1X longer than third.

Mesosoma. Pronotum smooth and shining. Epomia distinct. Front portion of mesoscutum with fine and dense punctures, hind portion nearly smooth, with indistinct punctures. Notaulus deep, reaching to the centre of mesoscutum. Scutellum convex, glossy. Front and lower portion of mesopleuron with weak and shallow punctures, median portion irregularly rugate. Mesopleuron with shallow punctures ( Fig.3 ). Mesopleural fovea consisting of a deep horizontal groove. Metapleuron with dense and indistinct oblique rugae. Submetapleural carina complete. Forewing vein 1cu­a a little basad of Rs+M. Areolet oblique quadrangle, petiolate or sessile, receiving 2m­cu distad of its center. Hind wing vein 1/Cu about 2X as long as cu­a. Claw small and simple. Propodeum with a distinct median longitudinal groove; coarse, with irregular and short wrinkles, petiolar area smooth. Apical transverse, pleural and lateral longitudinal carinae distinct. Propodeal spiracle round, close to pleural carina.

Metasoma. Very slender. First tergite about 3.7–4.0X longer than its apical width, with irregular short rugae, median dorsal carina reaching to 0.66 of first tergite, spiracle projecting. Second tergite about 1.6–1.7X longer than its apical width, base portion with dense and irregular rugae, apical portion weakly coarse. Tergites 3–7 weakly coarse. Third tergite about 1.6X longer than its basal width. Ovipositor sheath length 13–13.5 mm.

Coloration. Black. Apical half of clypeus and legs reddish brown. Mandible except apical tooth, scape, pedicel, ventral side of first flagellomere, front and middle coxae and trochanters yellowish brown. Palpi, upper hind corner of pronotum and tegula yellowish white. Flagellomeres of antenna and dorsal side of hind femur blackish brown. Hind tibia and tarsus brownish black. Wing slightly brownish hyaline. Stigma brown. Veins brownish black.

Male. Unknown.

Type material. Holotype Ψ, CHINA: Daxinggou, 550 m, N43º35', E129º55', Jilin Province, 2005. VI.29, M.–L. Sheng ( GSFPM). Paratype: 1Ψ, same data as holotype ( GSFPM).

Distribution. China (Jilin).

Etymology. The species name is based on the texture of face.

Remarks. The new species can be easily distinguished from O. tenuis Townes by the face with very sparse, fine and indistinct punctures ( Fig. 2 ), apical half of clypeus darkish red, mandible (except the apical tooth) and hind coxa reddish brown. O. tenuis : face with dense and distinct punctures on its center portion ( Fig. 5 ), clypeus, mandible and hind coxa black.

Figures

FIGURES 1 – 3. Ortholaba laevis, sp. nov. 1. body, lateral view. 2. Face. 3. Mesopleuron.

FIGURES 4 – 6. Ortholaba tenuis Townes. 4. body, lateral view. 5. Face. 6. Mesopleuron.