Sliochia adustifemur, Han & Achterberg & Chen, 2022

Han, Yuan-Yuan, Achterberg, Kees Van & Chen, Xue-Xin, 2022, The rare genera Picacharops Gauld and Sliochia Gauld (Hymenoptera, Ichneumonidae, Campopleginae) found in China, with description of two new species, Zootaxa 5133 (4), pp. 577-584 : 581-582

Sliochia adustifemur sp. nov.

Figs 3–4

Material examined. Holotype: female, Guizhou, Leishanxian Leishanxiang Natural Reserve, 2.VI.2005, Liu Jingxian, No 202019697 ( ZJUH).

Description. Holotype female ( Fig. 3 ). Body length 4.5 mm, fore wing length 3.4 mm.

Head. Antenna with 25 flagellomeres; first flagellomere 1.2× longer than second flagellomere. Face ( Fig. 4F ) granulose. Clypeus ( Fig. 4F ) granulose, not convex in lateral view, apical margin slightly arched, sharp. Malar space granulose, its length 0.5× basal width of mandible. Mandible with a weak lamella, upper tooth slightly longer than lower tooth. Frons granulose, median carina absent. Vertex granulose. Inner margin of eye not indented opposite antennal socket. Interocellar distance ( Fig. 4G ) 1.1× ocello-ocular distance and 1.5× distance between median and lateral ocelli. Temple granulose, mat, not swollen behind eyes. Occipital carina evenly arched, reaching hypostomal carina above mandible base.

Mesosoma. Pronotum granulose-rugulose dorsally, mat, transversely striate below. Mesoscutum ( Fig. 4H ) granulose, rugose on notaulic area. Scutellum and metanotum granulose. Mesopleuron ( Fig. 4B ) granulose, weakly transversely striate below tegula. Metapleuron granulose. Propodeum ( Fig. 4C ) with area basalis trapozoid; area superomedia confluent with area petiolaris, slightly depressed; area superomedia granulose-rugulose; area petiolaris rugose; area externa and area dentipara granulose; all carinae distinctly developed.

Wing. Fore wing ( Fig. 4A ) areolet absent, length of vein M between 2rs-m and 2m-cu approx. 0.4× vein 2rs-m. Marginal cell short, distal part of surrounding vein 2.3× longer than proximal one. Vein 1cu-a opposite vein M&RS, vein 1cu-a strongly oblique and angle with vein AA (60°). External angles of second discal cell nearly straight (80°). Hind wing with vein CU&cu-a nearly vertical, not intercepted.

Legs. Hind femur 3.8× longer than wide. Inner spur of hind tibia 0.7× as long as first tarsomere of hind tarsus. First tarsal segment with ventral row of setae medially ( Fig. 4E ). Tarsal claws weakly pectinate basally.

Metasoma. ( Fig. 4J ) First metasomal segment ( Fig. 4D ) without glymma. First tergite 2.6× longer than width of postpetiole. Postpetiole granulose. Second tergite granulose-rugulose basally, smooth and shiny apically, 0.6× as long as first tergite, 0.8× longer than its apical width; thyridium transverse oval, its distance from basal margin of tergite 0.5× its length. Third tergite 0.8× longer than its apical width. Sixth and seventh tergites without medial emargination. From third tergite on smooth and shiny. Ovipositor ( Fig. 4I ) straight, with a nodus before an inconspicuous dorsal subapical notch.

Colour. Black. Mandible except teeth, scape and pedicel, palpi, tegula, fore and mid legs, hind coxa, trochanter, trochantellus and tibia basal 0.5, yellowish brown; hind femur and tibia apical 0.5, brown; hind tarsal segments blackish brown; metasoma from third segment on laterally yellowish brown, remainder of metasoma blackish.

Distribution. China (Guizhou).

Notes. We have placed this new species in Sliochia because the new species matches the generic characters well. The new species differs distinctly from the only other known species of this genus, S. bala as shown in the key above.

Etymology. Name derived from “adustus” (Latin for “brown”) and “femur” (Latin for “thigh”), because its hind femur brown.

Figures

FIGURE 3. Sliochia adustifemur sp. nov., holotype, female, habitus.

FIGURE 4. Sliochia adustifemur sp. nov., holotype, female. A fore wing B mesopleuron, lateral view C propodeum, dorsal view D first metasomal segment, lateral view E Hind first tarsal segment, lateral view F head, anterior view G head, dorsal view H mesoscutum, dorsal view I ovipositor J metasoma, dorsal view.