Mesopolobus beilingicus Sun & Xiao, 2016

Xiao, Hui, Sun, Lei, Jiao, Tianyang & Li, Zi, 2016, A revision of Chinese species of Mesopolobus Westwood (Hymenoptera: Pteromalidae) with descriptions of four new species from China, Zoological Systematics 41 (1), pp. 64-81 : 78-79

Mesopolobus beilingicus Sun & Xiao , sp. nov. ( Figs 33–35 )

Female. Body length ( Figs 33, 34 ) 1.8–2.5 mm. Head and thorax green with metal reflections, gaster ocherous yellow. Antenna pale yellow. Leg pale yellow except coxa concolorous with thorax, hind femur brown, apical segment of tarsus brown. Tegula brown yellow. Fore wing hyaline, veins yellow.

Head width 1.3× as height in front view ( Fig. 35 ), eyes separated by about 1.19× eye height, space 0.38× as eye height, lower margin of clypeus shallowly emarginated and with radiate striation. Head in dorsal view 1.89× as wide as long, wider than thorax (1.23×); temple straight, temple length 0.35× as long as eye length; POL 2.17× OOL. Antennal formula ( Fig. 35 ) with 3 small anelli, antennal insertion slightly above lower ocular line; scape 0.77× as eye height, not reaching anterior ocellus; each funicular segments transverse, clava clavate (1.75× width); pedicel and flagellum combined shorter than head width (0.85× head width). Relative measurements: head width 53, height 40, dorsal length 28, frons width 31, eye height 26, eye length 20, oral fossa 26, malar space 10, antennal torulus to clypeal margin 13, antennal torulus to anterior ocellus 22, pedicel in dorsal view length: width as 9: 4, clava length: width as 14: 8, POL: OOL as 13: 6, temple 7, posterior ocellus long diameter 4.

Pronotum with collar not margined, collar medially about 1/11 times as long as mesoscutum; mesoscutum 1.26× as broad as long; scutellum with reticulation smaller and shallower than those on mesoscutum, frenal area indistinct, scutellum as long as broad; propodeum ( Fig. 33 ) smooth except anterior margin with longitudinal carina, median carina and plica complete, nucha short and smooth. Basal vein with several setae, basal cell bare, stigmal vein straight, marginal vein 2.2× as long as stigma vein. Gaster long ovate ( Figs 33, 34 ), 2.3× as long as broad, slightly longer than head plus thorax; tip of hypopygium slightly more than 1/2 length of gaster. Relative measurements: mesoscutum width: length as 43: 34; scutellum width: length as 24: 24; propodeum medially width: length as 20: 8, marginal vein 33, postmarginal vein 24, stigmal vein 15, gaster length: width as 115: 50, mesosoma length 67.

Male. Body length 1.5–2.0 mm. Apical segment of tarsus slight brown. Tegula yellow, veins pale yellow. Head in dorsal view 2× as wide as long, temple length 0.4× as long as eye length; POL 2.8× OOL. Mesoscutum 1.31× as broad as long. Marginal vein 2× as long as stigma vein. Relative measurements: head width 56, length 28; oral fossa 28, malar space 10; eye height 20, temple 8, POL: OOL as 14: 5; mesoscutum width: length as 46: 35; propodeum medially width: length as 18: 10, marginal vein 32, postmarginal vein 28, stigmal vein 16, gaster length 80, head plus thorax 95.

Material examined. Holotype. ♀, China, Liaoning, Shenyang, Beiling (41°48′N, 123°25′E), 27 July 90, coll. Naiquan Lin ( IZCAS) . Paratypes, 7♀ 5♂, the same data as holotype .

Diagnosis. This species is close to M. aequus with the body shape and gaster color, but can be clearly separated by the torulus located in lower face, slight above lower ocular line (torulus location distinctly above lower ocular line in M. aequus ), antennal formula 11263 (11353 in M. aequus ).

Etymology. The specific name is from the name of the type locality, Beiling, Shenyang of Liaoning Province.

Biology. Unknown.

Distribution. China (Liaoning).

Figures

Figures 27–35. Mesopolobus spp. 27. M. tortricidis Kamijo, male, head and thorax laterial. 28. M. typographi (Ruschka), body dorsal. 29–32. M. equivenae Sun & Xiao sp. nov. female. 29. Body dorsal. 30. Body laterial. 31. Head frontal. 32. Fore wing. 33–35. M. beilingicus Sun & Xiao sp. nov.. 33. Body dorsal. 34. Body laterial. 35. Head frontal.