Gasteruption formosanum Enderlein, 1913

Zhao, Ke-xin, Achterberg, Cornelis van & Xu, Zai-fu, 2012, A revision of the Chinese Gasteruptiidae (Hymenoptera, Evanioidea), ZooKeys 237, pp. 1-123 : 42-44

Gasteruption formosanum Enderlein, 1913 Figs 124141

Gasteruption formosanum Enderlein, 1913: 326; Hedicke 1939: 27; Pasteels 1958: 188-189, fig. 13.

Type material.

Holotype, ♂ (DEI), "[China:] Formosa [= Taiwan], Taihorin [in Chiayi county], 1911, H. Sauter", “7.VIII.”, “Holotypus”, " Gasteruption formosanum Enderl., ♂, Type, Dr. Enderlein, det. 1913", "Dtsch. Entomol. Institut Berlin".

Additional material.

1 ♂ (RMNH), "[China:] Zhejiang, Mt. Tianmu, 15.ix.1947"; 2 ♀ + 2 ♂ (ZJUH, RMNH), "[China:] Fujian, Fuzhou, 25.IV.1991, Chang-ming Liu"; 1 ♀ (TARI), " [China:] Taiwan, Taipei, 21.V.1959, S.C. Chui"; 1 ♀ (TARI), " [China:] Taiwan, Rokkiri, 15.III.1918, T. Shiraki"; 1 ♀ (RMNH), "[China:] Hunan, Linyang, near Changsha, 30.VI.1985, RMNH’11”.

Diagnosis.

Apex of ovipositor sheath black or dark brown (Fig. 131); ovipositor sheath about 0.8 times as long as hind tibia and tarsus combined, about 0.4 times as long as metasoma and about 1.3 times as long as hind tibia; head somewhat elongate in anterior and dorsal view, emarginate medio-posteriorly; first discal cell of fore wing subparallel-sided (Figs 130, 140); occipital carina narrow and non-lamelliform medio-dorsally (Figs 124, 133); antesternal carina narrow; mesoscutum very finely and densely coriaceous, matt and with coarse, more or less isolated punctures (Figs 126, 135), smaller and sparser on lateral lobes and medio-posteriorly with coarse transverse rugae; hind tibia robust and swollen, about as long as hind femur and trochanter combined (Figs 127, 136); hind basitarsus comparatively short, widened basally and black; malar space 0.3 times as long as second antennal segment (= pedicellus); propodeum regularly coarsely reticulate or scrobiculate, median carina of propodeum as a slightly elevated coriaceous median line; eyes with short setae; pronotum with small tooth antero-laterally; vertex and frons shiny and very finely punctulate; propleuron 0.8-0.9 times as long as mesoscutum in front of tegulae and robust (Figs 125, 134); notauli distinct, finely crenulate and medium-sized (Figs 126, 135); hind tibia with pale subbasal patch; hind basitarsus black; apical 0.2 of hypopygium of ♀ incised; apex of ovipositor narrow and acute.

Description.

Holotype, male, body length 12.8 mm, of fore wing 6.1 mm.

Head. Head distinctly incised medio-posteriorly (Fig. 139); vertex and frons with shiny, largely smooth and very finely punctulate (Fig. 139), moderately convex (Fig. 133) and without a depression medio-posteriorly (Fig. 139); head directly narrowed behind eyes; temple nearly as long as eye in dorsal view (Fig. 139); fourth antennal segment 1.1 times as long as third segment and 0.7 times as long as second and third segments combined, fifth antennal segment nearly as long as third segment (Fig. 137), third antennal segment 1.9 times as long as second segment and moderately slender (Fig. 137); occipital carina narrow and non-lamelliform medio-dorsally (Fig. 133); ocelli comparatively small, OOL 1.5 times as long as diameter of posterior ocellus; face moderately wide (Fig. 138); minimum width of malar space 0.4 times as long as second antennal segment (Fig. 133); clypeus without triangular depression and slightly emarginate; eye with short setae.

Mesosoma. Length of mesosoma 1.3 times its height; pronotal side short triangular and largely coarsely reticulate-rugose (as mesopleuron), antero-laterally only angularly protruding; mesoscutum slightly protruding anteriorly; propleuron wide (Fig. 134) and 0.8 times as long as mesoscutum in front of tegulae; antesternal carina narrow and hardly lamelliform; mesoscutum very finely and densely coriaceous, matt and with large, more or less isolated punctures (Fig. 135), smaller and sparser on lateral lobes and medio-posteriorly and near lateral margin with coarse transverse rugae; scutellum coarsely punctate and superficially coriaceous; propodeum coarsely reticulate or scrobiculate, median carina of propodeum as a slightly elevated coriaceous median line.

Wings. First discal cell parallel-sided and with outer posterior corner rounded (Fig. 140).

Legs. Hind coxa rather matt, moderately stout, transversely rugose and coriaceous; length of hind femur, tibia and basitarsus 4.2, 4.0 and 5.0 times their width, respectively; hind tibia swollen, sparsely punctate and as long as hind tibia and trochanter combined; hind basitarsus rather short and somewhat widened basally (Fig. 136); middle tarsus 1.1 times as long as middle tibia; middle femur about as slender as fore femur.

Metasoma. Paramere dark brown (Fig. 141).

Colour. Black or black-brown; tegulae and legs (including hind tibial spurs) dark brown or nearly so, but hind tibia with subbasal ivory patch ventrally, fore and middle tibiae basally and fore and middle basitarsi (except apically) pale yellow; wing membrane slightly infuscate; pterostigma dark brown.

Female (described after a female from Taiwan). Head behind eyes rather directly narrowed in dorsal view (Fig. 129); occipital carina narrow and non-lamelliform medio-dorsally (Fig. 124); face comparatively narrow (Fig. 128); third antennal segment about twice as long as second segment (Fig. 132); fourth segment 1.1 times as long as third segment, fifth segment as long as third segment, and 0.7 times as long as second and third segments combined; vertex with satin sheen and finely punctulate; eye short setose; frons normal and anterior ocellus near upper level of frons (Fig. 129); propleuron robust and 0.9 times as long as mesoscutum in front of tegulae (Fig. 125); mesoscutum densely coriaceous, between coarse punctures and medio-posteriorly distinctly punctate-rugose (Fig. 126); hind coxa moderately robust in dorsal view; hind basitarsus distinctly widened basally, especially in dorsal view; hind leg dark brown, but with ivory patch ventrally near basal 0.4 of hind tibia (Fig. 127); apical half of first metasomal tergite and second tergite dark brown; body length 13.6 mm; ovipositor sheath 0.2 times as long as body, 0.4 times as long as metasoma and 1.3 times as long as hind tibia; sheath apically dark brown; hypopygium v-shaped incised apically.

Distribution.

China (Zhejiang, Fujian, Taiwan, Hunan).

Biology.

Unknown. Collected in March–May and September.