Abstract:

A new sawfly species of Cimbicidae, Hymenoptera is described from Gansu Province, China:Agenocimbex elmina sp.nov.. The type specimens are deposited in the Insect Collection of Forestry College, Northwest Science Technology University of Agriculture and Forestry, Yangling, Shaanxi Province, China. Agenocimbex elmina Li et Wu, sp.nov.(Fig.1) This new species is similar to Agenocimbex esakii Takeuchi, but differs from it in thorax mainly black with only a few pale brown spots, the outer margin of front wing distincly infumate, antenna as long as thorax, the middle furrow in the postocellar area shallow, mesepisternum densely punctured, mesoscutellum without middle furrow and jugum of hind wing with a closed cell. Biology:The host of the new species is Ulmus pumila L.et al. and it has one generation a year.

Key words: Hymenoptera, Cimbicidae, Agenocimbex, New species