叶蜂属fortunii种团一新种(膜翅目:叶蜂科)

A New Species of fortunii group of Tenthredo from China(Hymenoptera:Tenthredinidae)

记述了采自陕西东部的叶蜂科Tenthredinidae叶蜂属TenthredoL.1新种:刺胸槌腹叶蜂TenthredodentipectaWeietNie,sp.nov.。该新种隶属于Tenthredo属的fortunii种团,并与该种团分布于印度尼西亚的T.corporaali(Forsius,1925)最为近似,区别为:新种体型较小,体长仅为10mm,中胸侧板光滑无刻点,单眼后区宽长比等于2,体褐色,腹部2～6节背板基部1/2黑褐色,触角第3节短于第4+5节之和等。

A new species of Tenthredo L. is described from Shaanxi Province, China.Type specimens are deposited in the insect Collection of Central South Forestry University, Changsha, Hunan, China.Tenthredo dentipecta Wei et Nie, sp. nov. （Figs. 1-4） Body length 10 mm. This new species is a member of Tenthredofortunii group and is close to T. corporaali （Forsius, 1925） from Indonesia, but it differs from the latter in body smaller, the mesepisternum impunctate and strongly shining, the postocellar area 2 times broader than long, body brown with the basal half of each of the abdominal tergites 1-6 blackish, and the third antennal segment clearly shorter than the fourth and fifth segments together （in latter species the body about 14mm in length, the mesepisternum densely punctate and reticulate, the postocellar area 3 times broader than long, thorax and abdomen black brown, the lateral sides of abdominal segments 2-6 with pale spots, and the third antennal segment longer than the fourth and fifth segments together）. The new species can be easily recognized from other members of the fortunii group by the ventral side of mesepisternum with an acute thorn. Holotype：♀, Huayin County, Shaanxi Province, 1500 m, 34.5°N, 110.0°E, 17- Ⅷ-1978, JIN Gen-tao; Paratype： 1♀, Huayin County, Shaanxi Province, 1600 m, 34.5°N, 110.0°E, 19-Ⅷ-1978, JIN Gen-tao.