Acroclisoides luzonensis Gahan, 1920

Figs 57–64

Acroclisoides luzonensis Gahan, 1920: 345. Holotype female (USNM, not examined).

Material examined.

China • 3 females, “ Huangfu Mt. 19 ?? VIII 26 ”, “ Liao, Dingxi ” (IZAS) . Indonesia • 18 females, 4 males, “ JAVA Buitenzorg 1937 J. S. Phillips Ex. Chrysocoris atricapilla ”, “ NHMUK 013455956 ”, “ NHMUK 013455961 ”, “ NHMUK 013455962 ”, “ NHMUK 013455964 ”, “ NHMUK 013455994 ”, “ NHMUK 013455995 ”, “ NHMUK 013455996 ”, “ NHMUK 013455997 ”, “ NHMUK 013456000 ”, “ NHMUK 013456001 ”, “ NHMUK 013456002 ”, “ NHMUK 013456003 ”, “ NHMUK 013456004 ”, “ NHMUK 013456005 ”, “ NHMUK 013456006 ”, “ NHMUK 013456007 ”, “ NHMUK 013456023 ” (NHMUK, ZISP) • 2 females, “ W. Java . 1937 Ex Chrysocoris atricapilla J. S. Phillips ”, “ Acroclisoides luzonensis Gahan det. Subba Rao, 197 ”, “ NHMUK 013455965 ” (NHMUK) . Malaysia • 9 females, “ MALAYA Kuala Lumpur Feb. 12.1939 ”, “ Ex F. M. S. Museum B. M. 1955-354 ”, “ NHMUK 013455947 ”, “ NHMUK 013455951 ”, “ NHMUK 013455952 ” (NHMUK) • 2 males, “ MALAYA Selangor Kuala Lumpur 7. VI. 1954 H. T. Pagden 17780 ”, “ Pres by Com Inst Ent B M 1957-248 ”, “ COM. INST. ENT. COLL. NO. 14126 ”, “ Ex eggs of Menida varipennis ”, “ NHMUK 013455998 ”, “ NHMUK 0134559998 ” (NHMUK) • 2 females “ MALAYSIA: Selangor Kuala Lumpur; Univ. of Malaya, Rimba IIma 16. VI. 90; J. M. Heraty; H 093; sweep Eugenia ”, “ Univ. Calif. Riverside Ent. Res. Museum UCRC ENT 508657 ”, “ Acroclisoides det. Xiao Hui 2004 ” (UCR) . Republic of Korea • 1 female, “ S. Korea: Gyeongsangnam-do (GN), Geochang-gun, SNME 35°44'54"N, 127°56'26"E, 22. VI. 2022 coll. Tselikh ” (NIBR) .

Description.

Female. Body length 1.40–2.00 mm; fore wing length 1.35–1.60 mm.

Coloration. Head and mesosoma dorsally dark blue with diffuse metallic luster; head frontally dark blue with diffuse green coppery luster; antenna with scape and pedicel yellow, anelli yellowish brown, F 1 – F 6 and clava brown. Fore and hind coxa dark blue with metallic diffuse luster, mid coxae yellowish brown, all femora, tibiae and tarsi yellow. Fore wing hyaline, venation brown. Metasoma dorsally dark brown with metallic blue violet luster; ovipositor sheaths brown.

Sculpture. Head and mesosoma reticulate; clypeus reticulate-striate; scutellum strongly reticulate, but frenal area finely reticulate; propodeum reticulate, nucha alutaceous; petiole smooth; metasoma smooth and shiny.

Head. In dorsal view 2.38–2.30 × as broad as long and 1.39–1.45 × as broad as mesoscutum; in frontal view 1.61–1.70 × as broad as high. POL 0.68–0.70 × as long as OOL. Eye height 1.13–1.14 × eye length and 2.35–2.61 × malar space. Distance between antennal toruli and lower margin of clypeus 2.43–2.50 × distance between antennal toruli and median ocellus. Antenna with scape 1.00–1.06 × as long as eye height and 1.13–1.20 × as long as eye length; pedicel 1.00–1.25 × as long as broad; combined length of pedicel and flagellum 0.93–0.94 × breadth of head; F 1 – F 6 longer than broad, F 1 2.10–2.20 × as long as broad and with two rows of sensilla; clava 2.22–2.33 × as long as broad, with small microsetose area on C 3 and C 4. Lower posterior corner of gena with small sharp spine. Lower margin of clypeus concave bilaterally, in middle part shallowly emarginate.

Mesosoma. 1.16–1.21 × as long as broad. Scutellum moderately arched, 0.83 × as long as broad, frenal area differentiated by a change in sculpture. Propodeum 0.63–0.80 × as long as scutellum, without costula but with median carina, nucha small. Fore wing 2.03–2.17 × as long as its maximum width; basal cell partly setose, basal vein setose; speculum closed below; M 0.85–0.86 × as long as PM and 1.16–1.30 × as long as S, stigma large.

Metasoma. 1.78–2.40 × as long as broad, 0.97–1.15 × as long as mesosoma, 0.69–0.78 × as long as mesosoma and head. Petiole 1.25 × as long as broad. Ovipositor sheaths projecting slightly beyond apex of metasoma.

Male. Body length 1.53–1.80 mm; fore wing length 1.38–1.67 mm. Eye height 1.93–2.00 × malar space. Distance between antennal toruli and lower margin of clypeus 2.00–2.10 × distance between antennal toruli and median ocellus. Metasoma 2.58–2.60 × as long as broad. Otherwise, similar to female.

Biology.

Egg parasitoids of hemipterans Eucorysses javanus (Westwood, 1837) (new host record) and Tectocoris lineola (Fabricius, 1781) ( Scutelleridae) and some Pentatomidae species. Hyperparasitoids of Trissolcus banksi (Gahan, 1921) ( Scelionidae) (UCD Community, 2025).

Distribution.

China (UCD Community 2025), Indonesia (new record), Malaysia (new record), Philippines (UCD Community 2025), Republic of Korea (new record).

Comments.

Acroclisoides luzonensis Gahan belongs to a group of species that have a hyaline fore wing in both sexes. This species is similar to A. major Girault & Dodd and A. nongae Tselikh, Lee & Ku, sp. nov.; the differences between these species are given in the key.