ALTA LOMA — As a prelude to Semana de la Raza Ill, Chaffey College and its MECHA chapter will present a folklorico quintet from Me xico City at 8 p.m. Thursday in the Little Theater. The group is Los Paupers, four brothers and a sister Jorge, Javier, Enrique, Ar mando and Yolanda Perea y Martinez. The program will include “Solamente Una Vez,” “A Si,” “Buena Viaje,” “Gra nada,’’ “Cuando Sali de Cuba,” “Tristeza,”” “Yo Ven do Unos Ojos Negros,” “El Jinete,” “La Panchita,” “La Malaguena,” “Chapala,” “Juan Colorado,” “La Bi kina,” “Ranch Alegre” and “El Carretero.”” Admission is free.