Apsilocera grandistigma Tselikh, Lee & Ku 2024, sp. nov.

Apsilocera grandistigma Tselikh, Lee & Ku sp. nov. Figs 48–55 Type material. Holotype • female, Republic of Korea: “ Gyeonggi-do, Pocheon-si, Soheul-eup, 37°45'01.6"N, 127°08'34.9"E, 24.V–12.VI.2017, coll. Kim, Kim, Nam ” (NIBR). Description. Female. Body length 1.40 mm; fore wing length 1.40 mm. Coloration. Head black; antenna with scape, pedicel, and anelli yellowish brown, F 1 – F 6 and clava brown. Mesosoma black; fore and mid coxa black, hind coxae basally black, apically yellowish brown, all femora yellowish brown, all tibiae and tarsi yellow. Fore wing hyaline, venation yellowish brown. Metasoma and ovipositor sheaths brown. Sculpture. Head reticulate; clypeus radially striate. Mesosoma reticulate; propodeum finely reticulate. Metasoma weakly alutaceous and shiny. Head. Head in dorsal view 2.26 × as broad as long and 1.21 × as broad as mesoscutum; in frontal view 1.13 × as broad as high. Vertex with two distinct crests not composed of small sharp teeth, leaving a depression in middle. POL 1.45 × as long as OOL. Eye height 1.27 × eye length and 1.75 × as long as malar space. Distance between antennal toruli and lower margin of clypeus 1.36 × distance between antennal toruli and median ocellus. Antenna with scape 0.80 × as long as eye height and 1.03 × as long as eye length; pedicel 1.88 × as long as broad; combined length of pedicel and flagellum 1.18 × breadth of head; F 1 – F 6 longer than broad, with 1 row of sensilla; clava 3.50 × as long as broad, with small micropilose area on each C 3 and C 4. Clypeal margin with one tooth. Mesosoma. Mesosoma 1.46 × as long as broad. Scutellum moderately depressed, 1.00 × as long as broad, frenal area indistinct. Propodeum 0.34 × as long as scutellum; nucha short. Fore wing 2.02 × as long as its maximum width; basal cell with several hairs; basal vein pilose; speculum partly closed below; M 0.75 × as long as PM and 1.50 × as long as S; stigma enlarged. Metasoma. Metasoma 1.40 × as long as broad, 1.00 × as long as mesosoma. Petiole strongly transverse. Ovipositor sheath projecting slightly beyond apex of metasoma. Male. Unknown. Etymology. From the Latin grandis and stigma, referring to the wide stigma of fore wing of this species. Distribution. Korean Peninsula. Comments. Apsilocera grandistigma sp. nov. belongs to a group of species that have a vertex with two distinct crests not composed of small sharp teeth, leaving a depression in middle. This species is very similar to A. bicristata; the differences between these species are given in the key.