Francesco, I just have received this pretty species. No idea what it is but it's the first time in 10 years I find this in a parcel; sorry the photo is not the best...
Ah, beautiful! I have never seen it before. It is a male of Tricholamia plagiata Bates, 1884, a very rarely found species. This is the drawing of a female provided by Waterhouse (1890). Lepesme provided a better one in Longicornia I (1950: 561)