Sinophorus neimengensis Han & Achterberg & Chen 2021, sp. nov.

Sinophorus neimengensis sp. nov.

Figures 5, 6

Material examined. Holotype: CHINA • ♀; Neimenggu, Gegentala; 16.VIII.2000; Yun-Ma leg.; No. 200100837. Paratypes: CHINA • 22♀ 15♂; Neimenggu, Zhengxiangbaiqi; 7.VIII.2002; Yuan-Chao Guo leg.; No. 20030227, 20030122, 20030322, 20030128, 20030361, 20030038, 20030141, 200010430, 20030272, 20030109, 20030352, 20030080, 20030342, 20030348, 20030346, 20030344, 20030072, 20030315, 20030066, 20030049, 20030047, 20030355, 20030351, 20030350, 20030115, 20030213, 20030043, 20030358, 20030359, 20030040, 20030110, 20030337, 20030362, 20030124, 20030330, 20030340, 20030144.

Description. Body length 7.2 mm, fore wing length 5.0 mm.

Head. Antenna with 35 flagellomeres; first flagellomere ca 1.2× length of second flagellomere. Face punctate, interspaces of punctures narrower than diameter of punctures. Clypeus punctate, interspaces of punctures equal to diameter of punctures dorsally and ca 1.0–2.0× ventrally, slightly convex, apical margin slightly curved, thick medially. Malar space weakly granulose, ca 0.5× basal width of mandible. Upper tooth of mandible as long as lower tooth, with a very weak lamella. Frons granulose-rugulose, median carina developed. Vertex granulose. Interocellar distance 2.2× ocello-ocular distance and 2.3× distance between median and lateral ocelli. Temple mat, ca 0.5× as long as eyes in lateral view. Occipital carina evenly arched, reaching hypostomal carina above mandible base.

Mesosoma. Pronotum punctate dorsally, transversely striate laterally. Mesoscutum punctate. Scutellum punctate. Metanotum mat. Mesopleuron punctate, transversely striate below tegula, speculum smooth and shiny, interspaces of punctures on lower half of mesopleuron 1.0–1.5× its diameter of punctures. Metapleuron punctate, interspaces of punctures 1.0–2.0× diameter of punctures. Propodeum with area basalis rectangular; anterior transverse carina close to base; area superomedia combined with area petiolaris; area superomedia rugulose, ca 0.8× as long as width of area petiolaris; area petiolaris transversely rugose; area externa granulose with sparse punctures; area dentipara rugose-punctate; area lateralis punctate; costula absent; lateromedian longitudinal carina weakly developed below costula, gradually stronger apically; lateral longitudinal carina absent; propodeal spiracle oval, connected with pleural carina by a distinct carina.

Wing. Fore wing areolet present and with a short stalk emitting 2m-cu vein slightly behind middle. Marginal cell short, RS vein ca 1.6× longer than 2r&RS. Vein 1cu-a opposite of M&RS. External angles of second discal cell acute (75°). Hind wing with CU&cu-a vertical, 2-CU connected to CU&cu-a, intercepted at lower 0.2 of its length.

Legs. Hind femur 4.8× longer than wide. Inner spur of hind tibia ca 0.6× as long as first tarsomere of hind tarsus. Tarsal claws pectinate, hind tarsal claw with 4 slanting teeth basally, ca 1.5× longer than arolium.

Metasoma. Surface somewhat coriaceous. First metasomal segment without dorso-lateral carina and lateral groove, suture separating first metasomal tergite from sternite ca 0.4 below mid height of petiole. First metasomal segment ca 2.2× length of width of postpetiole; petiole ca 1.5× longer than postpetiole. Second tergite ca 0.7× as long as first tergite, 1.1× longer than its apical width; thyridium round, its distance from basal margin of tergite ca 0.8× its diameter. Third tergite 0.8× as long as its apical width. Ovipositor sheath ca 1.4× longer than hind femur, ca 1.6× longer than first metasomal segment, and ca 0.9× as long as hind tibia. Ovipositor slightly upcurved, with depth at mid-length longer than width of hind first tarsomere, tip of upper valve of ovipositor ca 1.4× longer than hind telotarsus.

Colour. Black. Mandible medially and palpi, yellowish brown; tegula yellow; scape and pedicel blackish brown; fore leg yellowish brown except coxa and telotarsus brown; mid leg yellowish brown except coxa, trochanter and telotarsus brown; hind coxa, trochanter and trochantellus blackish brown, hind femur yellowish brown except basally and apically infuscated, hind tibia basally and medially, first tarsomere 0.7, second tarsomere 0.3, third tarsomere 0.2 whitish yellow, remainder of hind leg blackish brown; metasoma entirely black.

Male. Face and clypeus more densely punctate than in female, temple 0.6–0.8× as long as eyes in lateral view, interocellar distance 1.8–2.2× ocello-ocular distance and 1.6–1.8× distance between median and lateral ocelli, hind femur 3.6–4.1× longer than wide.

Variation. Face punctate or rarely granulose-punctate, temple 0.5–0.6× as long as eyes in lateral view, propodeal costula absent to moderately developed, area external granulose with sparse punctures to dense punctures, RS vein 1.6–2.1× longer than 2r&RS vein, fore wing areolet emitting 2m-cu vein slightly before middle to slightly behind middle, hind wing CU&cu-a vertical to slightly reclivous, intercepted or not, hind tarsal claw with 3–4 slanting teeth basally, mid trochanter yellowish brown to brown.

Comparison. This species is similar to S. pleuralis (Thomson, 1887), but differs from the latter by having upper tooth of mandible as long as lower tooth, temple ca 0.5× as long as eyes in lateral view, interspaces of punctures of lower half of mesopleuron 1.0–1.5× diameter of punctures, propodeal median area weakly excavated, and hind tibia basally and medially whitish yellow. S. pleuralis: upper tooth of mandible longer than lower tooth, temple 1.1–1.3× longer than eyes in lateral view, interspaces of punctures of lower half of mesopleuron at most equal to diameter of punctures, propodeal median area moderately to strongly excavated, and hind tibia ferruginous interno-medially and white externo-medially.

Etymology. Name derived from the name of the province where the type of the species has been collected.