A revision of Chinese species of Mesopolobus Westwood (Hymenoptera: Pteromalidae) with descriptions of four new species from China Author Xiao, Hui Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; E-mail: xiaoh @ ioz. ac. cn Author Sun, Lei Plant Protection College, Shandong Agricultural University, Tai’an, Shandong, 271018, China Author Jiao, Tianyang Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; E-mail: xiaoh @ ioz. ac. cn & College of Life Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100101, China Author Li, Zi Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; E-mail: xiaoh @ ioz. ac. cn & College of Life Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100101, China text Zoological Systematics 2016 41 1 64 81 http://zoobank.org/9aaf42bb-d96d-4b3f-be8e-8fcd05d4ea7d journal article 4169 10.11865/zs.201604 74b7bfe4-e37c-4095-9f3e-78e0f9cbef6a 2095-6827 4617570 9AAF42BB-D96D-4B3F-BE8E-8FCD05D4EA7D Mesopolobus equivenae Sun & Xiao , sp. nov. ( Figs 29–32 ) Female. Body ( Figs 29, 30 ) length 2.4–3.4 mm . Head and thorax dark green, gaster green with copper-colored reflections. Antenna black brown. Leg concolorous with thorax except tibia brown, tarsus brown-yellow. Fore wing hyaline, veins brown. Head width 1.32× as height in front view ( Fig. 31 ), eyes separated by about 1.15× eye height, space 0.48× as eye height, lower margin of clypeus shallowly emarginated and with radiate striation. Head in dorsal view 2× as wide as long; temple straight, temple length 0.46× as long as eye length; POL 2.2× OOL. Antenna ( Fig. 31 ) with 2 anelli, antennal insertion slightly above lower ocular line; scape 0.88× as eye height, not reaching anterior ocellus; Fu 1 rectangle (1.17× width), clava clavate (1.67× width); pedicel and flagellum combined slightly longer than head width (1.08× head width). Relative measurements: head width 82, height 62, dorsal length 41, frons width 46, eye height 40, eye length 28, oral fossa 38, malar space 19, antennal torulus to clypeal margin 20, antennal torulus to anterior ocellus 37, pedicel length: width as 13: 6, F1 length: width as 7: 6, clava length: width as 15: 9, POL: OOL as 22: 10, temple 13. Pronotum with collar slightly margined; mesoscutum 1.63× as broad as long; scutellum with reticulation smaller and shallower than those on mesoscutum, frenal area indistinct, scutellum 1.05× as long as broad; propodeum with median carina and plica complete, nucha short and smooth. Fore wing ( Fig. 32 ) with basal vein complete, basal cell hairy on partially, stigmal vein slightly curve, marginal vein as long as postmarginal vein. Gaster spear-shaped, 2.8× as long as broad, distinctly longer than head plus thorax ( Fig. 29 ); tip of hypopygium longer than 1/2 length of gaster ( Fig. 30 ). Relative measurements: mesoscutum width: length as 78: 48; scutellum width: length as 38: 40; propodeum medially width: length as 32: 13, marginal vein 54, postmarginal vein 54, stigmal vein 29, gaster length: width as 180: 64. Male. Unknown. Material examined. Holotype . ♀ , China , Yunnan , Lijiang , Lidiping ( 26°52′N , 100°14′E ), 3 400 m , 14 August 1984 , coll. Changfang Li ( IZCAS ) . Paratypes , 1♀ , same data as holotype . Diagnosis. The new species is similar to M. zetterstestii , but the gaster is 2.8 times as long as broad in the new species (1.6–2× in M. zetterstesti ), propodeum width is 2.46 times as long as broad (1.5× in M. zetterstesti ). Etymology. The new species has the marginal vein as long as postmarginal vein, so the new species name is from Latin words equi - and venae . Biology. Unknown. Distribution. China ( Yunnan ).