In identifying the insect specimens collected from the Lengshuihe Nature Preserve, Guizhou, a new species of the genus Hebarditettix, H. vallis Zha Wen sp. nov. was found. We describe it and provide illustrations. It is similar to H. armatus（Hancock） but differs from the latter by： 1） antennae inserted distinctly below lower margins of eyes, the longest segment only 6 times as long as wide; 2） abbreviated carinae between shoulders inconspicuous; 3） lower margin of fore femur with two small teeth, mid femur as wide as visible part of tegmen; 4） hind process of pronotum short, only reaching two-fifths of hind tibia. An updated key to all species of the genus Hebarditettix is given.
