Eugenio Abrego was a Mexican "Norteno" musician from Nuevo Leon, in the region of General Teran, Mexico, born May 22, 1922. He and fellow musician Tomas Ortiz (born June 2, 1924) met in the early 1940s and formed the duet Abrego-Ortiz.
They quickly rose in popularity, changing their name to Los Alegres de Teran, and were eventually discovered by Columbia de Mexico recording company. Los Alegres de Teran toured internationally, including in Japan, Iraq, Spain, and Africa, introducing the sounds of Nortena music to the world. Abrego died in 1988 and Ortiz in 2007.
Montoya has depicted the musicians as 'calaveras' (skulls) which have been part of the Latin American culture since the 15th century but in the 19th century became associated with living beings in part to remind them of their mortality, especially in the work of the great Mexican printmaker José Guadalupe Posada. The images depicted as skeletons exhibiting recognizable traits, making them easily identifiable as individuals or behaviors.