Tenthredo grahami, Malaise, 1945

Xiao, Wei, Niu, Gengyun & Wei, Meicai, 2020, Two new species of the Tenthredo grahami group from China (Hymenoptera: Tenthredinidae), with a revised key to species, Zoological Systematics 45 (2), pp. 118-125 : 118-119

Tenthredo grahami group

Diagnosis. The species of the T. grahami group can be easily recognized by the combination of following characters: the alive body mainly green with broad black maculae on dorsum of head and thorax, the pterostigma entirely green, and the supraantennal tubercles strongly elevated and abruptly cut off from the frontal walls.

General description. Body mainly green in alive but brownish yellow in dried specimens, dorsum of head and of thorax with broad black maculae, mesepisternum usually with narrow black stripe; legs green with black stripe; pterostigma yellowish green; antenna filiform, not longer than length of head and thorax, flagellum entirely black, third antennomere clearly longer than forth antennomere, subapical antennomeres indistinctly dilated; clypeus broader than shortest distance between eyes, anterior margin shallowly incised; malar space not longer than diameter of lateral ocellus; supraantennal tubercles strongly elevated, not shorter than length of frons, dorsum round, posterior end sharply cut off from frontal walls; frontal walls low and obtuse; postocellar area transverse; occipital carina complete and sharp, ventral fold absent; mesoscutellum roundly elevated, without carina; mesepisternum roundly and weakly elevated, without peak, ventral thorn absent; anal cell in hind wing sessile; ovipositor sheath not shorter than length of front tibia; dorsum of head and thorax weakly microsculptured, without distinct puncture, less shiny; lancet long and narrow, distinctly sclerotized; penis valve sclerotized in dorsal half, apical margin more or less produced, sometimes with a long process.

Remarks. Species of the T. grahami group occurs only in Eastern Asia. In the Zhelochovtsev (1988) system of Tenthredo , species of the T. grahami group belongs to subgenus Olivacedo .