山东危害槐树的三刺角蝉属一新种(同翅目:角蝉科:露盾角蝉亚科)

A NEW SPECIES OF TRICENTRUS (HOMOPTERA: MEMBRACIDAE) DAMAGING SOPHORA JAPONICA LINN. IN SHANDONG PROVINCE, CHINA

本文记述在山东省危害槐树ＳｏｐｈｏｒａｊａｐｏｎｉｃａＬｉｎｎａｅｕｓ的三刺角蝉属Ｔｒｉｃｅｎｔｒｕｓ１新种：槐树三刺角蝉Ｔｒｉｃｅｎｔｒｕｓｓｏｐｈｏｒａｅｓｐ．ｎｏｖ．，其寄主除槐树外，还有龙爪槐Ｓ．ｊａｐｏｎｉｃａｆ．ｐｅｎｄｕｌａＬｏｎｄ．，刺槐ＲｏｂｒｉｎｉａｐｓｅｕｄｏａｃａｃｉａＬｉｎｎ．，紫穗槐ＡｍｏｒｐｈａｆｒｕｔｉｃｏｓａＬｉｎｎ．。

In the present paper, a new species of the genus Tricentrus Stl,1866 damaging Japanese Pagodatree ( Sophora japonica Linn.) in Shandong province,China is descriped.All the type specimens are deposited in the Entomological Museum,Northwestern Agricultural University. The measurements are expressed in millimeters. Tricentrus sophorae Yuan et Yan, sp.nov. (Fig.1) Adult:Smaller and dark brown, covered with dense golden pubescence and puncture.Body length from front of head to tops of tegmina ♀5.10～6.00,4.20～5.00, width between tips of humeral angles ♀ 1.86～1.90, 2.10～2.30., distance between tips of suprahumerals ♀ 2.10～3.00,2.00～2.10.Female bigger than male,suprahumerals extand beyond humeral angles,thier length is about 1/3 of distance between the bases of both suprahumerals.Male suprahumerals shorter and not extand to humeral angles.Tegmina with basal area carioceous and punctate, all the apical cells and apical limbus yellowish brown,but the rest white and hyaline. Ovum:Oval,slightly curved,lacte and smooth,1.00～1.20×0.34～0. 35. The micropyle is at the wide end. Nympha:5 instar stadia 1st instar:1.36～1.66×0.36～0. 52. Thoracic nota slightly higher than vertex,and pro ,meso and metanota with uniform width.The posterior margin of pronotum straight. 2nd instar:1.70～2.22×0.60～0.66. Thoracic nota slightly elevated. The posterior margin of pronotum slightly curved backwards. 3rd instar:2.32～3.30×0.76～0.90. Thoracic nota more elevated. The posterior margin of pronotum projects backwards. Tegmen and wing buds emerge. 4th instar:3.18～4.48×1.02～1.36. Thoracic nota obviously elevated. The posterior process of pronotum extands to 1/3 of mesonotum. The buds of suprohumerals emerge and take the triangular form. Tegmen and wing buds extand back-and downwards. 5th instar:4.38～5.64×1.48～1.94. Pronotum obviously elevated, and its posterior process extands to 1/2 of mesonotum. The buds of suprahumerals triangular. Tegmen and wing buds extand to the middle of 3rd abdominal segment. Host plant: Sophora japonica Linn., Sophora japonica f. pendula Hort., Robinia pseudoacacia Linn.,and Amorpha fruticosa Linn.All the plants belong to the family Leguminosae. Type specimens:Holotype ♀,Shanghe County,Shandong Province, Ⅶ-1997, collec ted by Yan Jiahe; Allotype , same as holotype; Paratypes 6♀♀,18, Shanghe County, Shandong Province, the beginning of June 1998, collected by Yan Jiahe. Remarks:This new species is similar in appearance to Tricentrus brunneus Funkhouser, 1918, but different from the latter in the following characters: suprahumerals short, thier length is about 1/3 of distance between the bases of suprahumerals; tegmina with apical cells and apical limbus yellowish brown; pronotal posterior process is elevated in the dorsal middle.