The genus Campoplex Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Campopleginae) from China Author Han, Yuan-Yuan 0000-0002-6438-7393 yyhan6@zju.edu.cn Author Achterberg, Kees Van 0000-0002-6495-4853 kees@vanachterberg.org Author Chen, Xue-Xin text Zootaxa 2021 2021-11-08 5066 1 1 121 journal article 2820 10.11646/zootaxa.5066.1.1 4299ae4b-28b1-414e-a827-a89158a63e89 1175-5326 5653939 6B3D85E9-31FE-4D08-8E15-BA8959DD1988 Campoplex acarus sp. nov. Figs. 3–4 Material examined. Holotype : female, Hubei , Shennongjia Muyuzhen , 19.V.2012 , Huang Junhao , No 20046116 ( ZJUH ). Description. Female ( Fig. 3 ) holotype . Body length 3.6 mm , fore wing length 2.8 mm . Head. Antenna with at least 16 flagellomeres (apical segments missing); first flagellomere 1.15× longer than second flagellomere. Face ( Fig. 4E ) granulose. Clypeus ( Fig. 4E ) granulose, slightly convex, apical margin slightly arched. Malar space granulose, 0.8× basal width of mandible. Mandible without lamella, upper tooth equal to the length of lower tooth. Frons granulose, median carina absent. Vertex granulose. Interocellar distance ( Fig. 4F ) 1.2× ocello-ocular distance and 1.6× distance between median and lateral ocelli. Temple granulose, subpolished, slightly swollen behind eyes. Occipital carina evenly arched, reaching hypostomal carina at mandible base. Mesosoma. Pronotum granulose, polished, not trans-striate below. Mesoscutum ( Fig. 4G ) granulose, notauli indistinct. Scutellum and metanotum granulose. Mesopleuron ( Fig. 4B ) granulose, weakly trans-striate below tegula, speculum smooth and shiny. Metapleuron ( Fig. 4B ) granulose. Propodeum ( Fig. 4C ) with area basalis trapezoid; area superomedia granulose, polished; area petiolaris rugose; area superomedia confluent with area petiolaris, not depressed; all carina distinctly developed but not high; propodeal spiracle small and round. Wing. Fore wing ( Fig. 4A ) without areolet. Marginal cell short, distal part of surrounding vein 2.1× longer than proximal one. Vein 1cu-a opposite M&RS. External angles of second discal cell acute (60°). Hind wing with nervellus inclivous, intercepted at lower 0.1. FIGURE 3. Campoplex acarus sp. nov. , female, habitus. Legs. Hind femur 5.0× longer than wide. Inner spur of hind tibia 0.55× as long as first tarsomere of hind tarsus. Tarsal claws not pectinate. Metasoma. First metasomal segment ( Fig. 4H ) round in cross-section of basal 0.3, with dorso-lateral carina and lateral groove. First tergite 2.8× longer than width of postpetiole. Postpetiole and second tergite granulose, mat. Second tergite 0.8× as long as first tergite, 3.0× longer than its apical width; thyridium round, its distance from basal margin of tergite 2.0× its diameter. Third tergite equal to its apical width. Sixth and seventh tergites without emarginations medially. Ovipositor sheath approx. 1.9× longer than hind femur, ovipositor ( Fig. 4D ) gradually upcurved. Colour. Black. Mandible except teeth, palpi, tegula, fore and mid legs trochanters and trochantellus, fore coxa apically and hind trochantellus whitish yellow; scape and pedicel blackish brown; fore coxa basally and telotarsus brown, remainder of fore leg yellowish brown; mid leg brown except tibia medially pale whitish; hind leg blackish brown with tibia medially pale whitish; metasoma entirely black. Distribution. China ( Hubei ). Comparative diagnosis. This species is similar to C. granulosus sp. nov. , but differs from the latter by having apical margin of clypeus slightly arched, malar space 0.8× basal width of mandible, temple not swollen behind eyes, pronotum not trans-striate below, propodeal area petiolaris rugose, second metasomal tergite 3.0× longer than its apical width, and body color different. Etymology. Name derived from “acares” (Greek for “short and small”), because its body size is small.