S. Mahunka szerk.: Folia Entomologica Hungarica 59. (Budapest, 1998)

Head with minute, black and dense pubescence. Labrum large, elongated, rounded apically. Base of labrum with a brown spot. Labrum and clypeus with long, white pubescence about 2 times longer than diameter of front ocellus. Clypeal emargination 0.5 times as deep as its median length. Basal half of mandibles white, palpi whitish brown. Vertex and temples shining, densely, finely and uniformly punctured with small shining interspaces as large as the diameter of a puncture. OOL : POL : OCL = 2.6 : 1.0 : 1.5. Length of antenna/length of costa - 4/3. Proportions of antennái segments: 3rd 41: 4th 47: 5th 44: 6th 36: 7th 29: 8th 28: 9th 27. Pronotum and propleuron moderately shining, densely and very finely punctured. Pronotum with smooth and shining hind margin. Mesonotum dull, extremely finely and densely punctured without shining interspaces. Mesonotum with sparse and very short white pubescence. Scutellum convex, blunt, moderately shining and moderately roughly but uniformly punctured. Hairs of scutellum about as long as the diameter of front ocellus. Mesoscutellar appendage roughly punctured, dull with shining longitudinal keel. Metascutellum convex, shining with very sporadic deep punctures. Mesopleuron dull, densely and moderately roughly punctured without interspaces, obtusely, subpyramidally raised. Mesopleuron with short, white, moderately dense pubescence. Mesosternum moderately deeply and densely punctured, moderately shining, without thorn. Cenchri white. Length of cenchrus/ distance of the 2 cenchri — 7/12. Coxae, trochanters black, fore femora whitish brown with black outer surface. Fore tibiae and tarsi whitish brown, middle and hind legs black. Fore and middle tibiae and tarsi with very short, white and dense pubescence. Hind tibiae and tarsi with short, dense and black pubescence. Inner hind tibial spur/basitarsus = 29/56. Claws deeply incised. Abdomen black, dorsal surface with strong bluish luster. First abdominal tergum finely granulated, the remaining abdominal terga with fine transverse surface sculpture. Wings yellowish hyaline, costa light brown, basal 2/3 of stigma piceous, apical 1/3 light brown, venation black. Length: 13.0 mm. Length of fore wing: 10.5 mm. Holotype female: Yulongshan Nat. Res., 50 km North of Lijang, China, 24-29. VI. 1993, E. Jednek and O. Sausa leg. The holotype is deposited in the Hungarian Natural History Museum Budapest. Tenthredo elongatissima sp. n. runs to T. appendicella Malaise, 1945 in Malaise's (1945) key. Differences: T. appendicella is smaller, not longer than 9.0 mm, sides of abdominal terga 1st—6th and 4th tergum are entirely white and abdomen without bluish metallic luster. Tenthredo cyanata Konow, 1898 also resembles T. elongatissima either but T. cyanata is robust, not slender and elongate, wide margin of pronotum, tegulae, labrum and clypeus, coxae, trochanters, femora, first and middle tibiae are white, mesopleuron is very flat with sharp carina on its lower part. Its closest relative is T. flatopleura Singh et Saini, 1987, but latter is much smaller than T. elongatissima, not longer than 10.0 mm, clypeus is slightly emarginated, clypeal emargination is about 0.3 times as long as its median length, 5-6th serrulae of the sawsheath of T. flatopleura with 14 minute teeth, and the ones of T. elongatissima with 4-7 larger teeth as shown in Figs 1 and 2. Tenthredo yunanensis sp. n. Female. Head predominantly black. White: inner orbits, outer orbits to the half heigth of the eyes but with a narrow white patch directing up to the temples, face below antennae, genae, clypeus, labrum, mandibles except their black apices and narrow strip along-