The new sp. is described and illustrated from 3 <3 and 39 collected in the state of Rondonia, Brazil (holotype 3, allotype 9: Ji-Parand, 11-1961, deposited in the author's collection). By the arrangement of the decumbent process of the dorsal branch of the superior appendages it belongs to the N. maria-group whose spp. had never been found in Brazil. It differs from the other spp. of this group by its color pattem, by the structure of the 6 superior appendages and shape of the $ posterior prothoracic lobe.