Mexico, Ixtapan de la Sal, 1850 m. Body length 13 mm. Not clearly visible on the photo: the first antennomeres have a sharp fine spine on their inner side.
With Martins "Cerambycidae Sul Americanos" I have reached the genus. But not the species, of course. The specimen shown on Larry's Cerambycidae site look so greyish that I did not recognize them... thank you!