This is a Saphanini Look on the side of the genre Metallyra what seems most likely or Paulianometallyra? However, the latter has a rough and rough pronotum which does not seem to me the case here. Here is my modest contribution
Con la llave des los Xystrocerini llego hasta el genero Saphanidus Jordan, 1894. Normalmente las especies tienen un color mas metálico. Saphanidus fulvus Jordan, 1903?