Аннотация:Neocollyris (Isocollyris) ornata sp. n. is described from southern Vietnam. The differences from both related N. (I.) apiceflava Dheurle, 2017 and N. (I.) sharovae Matalin, 2021 are discussed. A modified key to Vietnamese species of the subgenus Isocollyris Naviaux, 1994 of the genus Neocollyris W. Horn, 1901 is given as well.