Abstract: In this paper a new species of the genus Hoplocampa──H. danfengensis is described, which is a serious pest of cherry in Shaanxi Province, china.Male:Body black,shining;antenna, palpi brownish black; apex of mandible reddish yellow; wings hyaline, barely tinged with brown; veins, margin of stigma pale yellow,center of stigma light yellow; legs with coxae,trochanters, base of femora black; tibiae,tarsi 1 and 2 yellowish brown; genitalia, apex of hypopygium reddish yellow. Clypeus convex, with anterior margin emarginate; fovea round, small and shallow;frontal carina distinct;antennal furrows deep; transverse suture distinct; lateral and coronal sutures obsolete; relative length of postocellar area to its width= 1:4.8;OOL:POL:OCL== 2.5: 2. 5: 1; hind tarsus about as long as hind tibia; penis valve see fig.1. Head, mesonotum, mesepisternum with fine, dense puncturest showingrugose surface;abdominal terga, sterna, Lypopygium with minute, dense punctures and fine sculptures. Body length 4-4. 5mm; antenna 9-segmented,length of segment 3: length of segments 4+5 = 1:1.3 pubescence on head and thorax short, golden yellow.Female: Body color as in male; antenna dorsally black, ventrally brownish black; veins, margin of stigma black; center of stigma greyish black;hind leg black; relative length of postocellar area to its width= 1:7.8;OOL: POL: OCL= 1: 5: 1; lancet see fig. 2; other characters as for male. Body length 4. 5-5mm; antenna 9-segmented, length of segment 3:length of segments 4 + 5 = 1 : 1. 4.Variability: In a few male specimens antenna dorsally dark yellow,ventrally yellow; 6th and 7th sterna reddish yellow; legs with femora except apices, tibiae, tarsi deep yellow. In the female, in a few cases, apex of abdomen and sterna deep yellow.Holotype , Danfeng County, Shaanxi Province, 22. -Ⅲ. 1991, Sun Yizhi leg. Allotype ♀, same as for holotype. Paratypes 14 , 2 ♀♀, same as for Holotype.Host:Prunus pseudocerasus Lindl.The new species resembles Hoplocampa rutilicornis (Klng),but differs from the latter in penis valve and lancet.The type specimens are kept in the insect collection of the Forest Research institute, the Chinese Academy of Forestry.

Key words: Hymenoptera, Tenthredinidae, Nematinae, Hoplocampa