Campoplex pingluoe Sheng & Cao, sp.nov.

(Figures 1–11)

Material examined. Holotype: female, Ningxia, Pingluo, 8 September 2024, reared from borers in trunk of Salix matsudana Koidz. by Chuan-Jian Cao (CBDPC.). Paratype: 1 male, same data as holotype.

Diagnosis. Postocellar line (Fig. 4) 2.2 × as long as ocular-ocellar line. Mesoscutum (Fig. 4), almost circularly strongly convex. Lateromedian longitudinal carinae of propodeum complete; area superomedia narrow, appoximately 2.5 × as long as maximum width. Tergite 1 (Fig. 1) 3.2 × as long as posterior width. Tergite 2 (Fig. 9) 2.5 × as long as posterior width. Head and mesosoma almost entirely black. Hind tibia and tarsus of female almost entirely black.

Description. Female (Fig. 1). Body length 7.3 mm. Fore wing length 4.2 mm. Ovipositor sheath length 2.7 mm.

Head. Face (Fig. 2) approximately 1.2 × as wide as long, slightly convex medially; with dense punctures, distance between punctures mainly 0.2–0.5 × diameter of puncture; upper margin indistinct. Inner orbits almost parallel, slightly concave near antennal sockets. Clypeus (Fig. 2) evenly convex, with texture almost as face, punctures slightly sparser than face; apical margin slightly evenly convex anteriorly. Mandible with fine punctures; basal 0.65 of lower margin forming distinct flange; upper tooth as long as lower tooth. Malar space finely shagreened, about 0.5 × as long as basal width of mandible. Gena (Fig. 3), evenly strongly converging to occipital carina, with fine punctures. Vertex (Fig. 4) with texture as gena. Stemmaticum convex. Postocellar line 2.2 × as long as ocular-ocellar line. Frons finely shagreened. Antenna with 31 flagellomeres; ratio of length from first to fifth flagellomeres approximately: 1.7:1.3:1.1:1.1:1.0. Occipital carina complete, lower end joining hypostomal carina above base of mandible.

Mesosoma. Pronotum (Fig. 3) shiny, subanterior margin with a distinct longitudinal carina; lower half of lateral concavity with oblique transverse wrinkles; upper-posterior portion with dense fine punctures. Epomia strong. Mesoscutum (Fig. 4) strongly convex, with dense punctures and yellowish white setae, distance between punctures 0.2–1.0 × diameter of puncture. Notaulus absent. Scutoscutellar groove with dense fine longitudinal wrinkles. Scutellum with uneven punctures, slightly concave postero-medially. Postscutellum with irregular indistinct wrinkles; anterior lateral portion with distinct circular pit, posterior convex transversely. Mesopleuron (Fig. 3) with dense punctures, distance between punctures 0.2–1.5 × diameter of puncture; speculum and its surrounding areas distinctly concave, smooth, shiny; in front of speculum with fine oblique wrinkles. Metapleuron slightly convex, with fine dense punctures. Basal portion of claw pectinate. Ratio of length of hind tarsomeres from first to fifth: 5.8:2.8:1.9:1.0:1.3. Wings (Fig. 6) vein 1cu-a opposite M&RS. Areolet oblique quadrangle, 3rs-m distinctly longer than 2rs-m. Postnervulus intercepted slightly above middle. Hind wing vein 1-cu approximately 2.3 × as long as cu-a. Propodeum (Fig. 5) elongate, lateromedian longitudinal and lateral longitudinal carinae and costula complete, strong; area externa with indistinct punctures; area basalis almost quadrate; area dentipara with weak irregular sculpture; area superomedia and area petiolaris confluent, evenly slanted posteriorly, without median concavity, with distinct transverse wrinkles. Propodeal spiracle small, elliptic.

Metasoma. Tergite 1 (Figs 7, 8) 3.2 × as long as posterior width; basal 0.7 of petiole almost parallel, shiny, posterior portion and anterior 0.3 of postpetiole shagreened; posterior shiny; latero-median carina almost absent; dorso-lateral carina present, basal 0.6 located about at median height of tergite 1; spiracle small, circular, located approximately at 0.6 of tergite 1. Tergites 2–6 with dense yellow brown setae. Tergite 2 (Fig. 9) shagreened, 2.5 × as long as posterior width. Tergites 3–6 strongly compressed, slightly shagreened. Posteromedian portions of tergites 6 and 7 with triangular concavities. Ovipositor sheath (Fig. 1) approximately 1.5 × as long as hind tibia. Ovipositor slightly evenly curved upwards; posterior portion compressed.

Coloration (Fig. 1). Black, except for the following: mandible except teeth, ventral profiles of scape and pedicel, maxillary and labial palpi, tegula, fore and middle coxae and trochanters yellow. Setae of gena and propodeum yellowish white. Dorsal profiles of scape and pedicel darkish brown. Wings slightly brownish gray. Fore and middle legs (except coxae) yellowish brown. Apex of hind coxa, ventral profile of trochanter, trochantellus yellow; dorsal profile of trochanter, ventro-apical portion of femur brownish red; base of tibia whitish yellow. Lateral profile of postpetiole, posterior portion of tertige 2, posterior half of tergite 3 and subsequent asymmetrically reddish brown. Pterostigma and veins brownish black.

Male (Figs 10, 11). Body length 5.3 mm. Fore wing length 3.0 mm. Antenna with 30 flagellomeres. Paramere strongly evenly narrowed to apex. Mandible except teeth, ventral profiles of scape and pedicel, maxillary and labial palpi, tegula, apical portions of fore and middle coxae and trochanter yellowish white. Hind femur reddish brown, media 0.6 of tibia and basal portion of tarsomeres 1 and 2 whitish yellow. Tergites almost entirely black.

Host. Unknown. Types of the new species emerged from the trunks of Salix matsudana Koidz. infested by borers (see Discussion).

Host plant. Salix matsudana Koidz.

Etymology. The specific name is derived from the type locality.

Remarks. The new species can be easily distinguished from other species of Campoplex by the following combination of characters: lateromedian longitudinal and lateral longitudinal carinae and costula of propodeum (Fig. 5) complete, strong; area superomedia narrow and elongate, appoximately 2.5 × as long as maximum width; area basalis almost quadrate; area superomedia and area petiolaris with distinct transverse wrinkles.