A new species of the genus Menglacris (Orthoptera, Catantopidae) from Yunnan Province, was described. The type specimen are deposited in the Institute of Zoology,Shaanxi Normal Univeristy.Menglacris zhengi Li et Xu,sp.nov.(Fig.1)The new species is allied to Menglacris maculata Jiang et Zheng,1994,but differs in: 1)Body small； 2)Frontal ridge with low longitudinal sulcus in whole length； 3)Apex of lower kneelobes of hind femur acute angle； 4)Female,length of median segment of antennae about 3.1 times its width； 5)Ancora located apex of anterior projection and apodemes short. Body length: ♂19.0-20.0 mm, ♀26.5 mm; Pronotum length: ♂5.0-5.2 mm, ♀7.5 mm; Length of tegmen: ♂3.0-3.5 mm, ♀4.5 mm; Length of hind femur: ♂13.0-13.5 mm, ♀17.0 mm;Holotype♂，Paratypes 2♂♂，1♀,Caiyanghe Nature Reserve (101°27′-101°15′E , 22°30′-22°38′ N), Pu′er, Yunnan Province,2007-Ⅶ-28,collected by XU Sheng-quan. Etymology: In honor Prof. ZHENG Zhe-min on ocusts classification work contribution for China,named after the new species with his surname Zheng.