THIS RESEARCH WAS CARRIED OUT DURING THE PERIOD SEPTEMBER 2018 - MARCH 2019, WITH THE OBJECTIVE OF TAXONOMICALLY DETERMINING THE SPECIES OF THE COCCINELLIDAE FAMILY AND THEIR POPULATION FLUCTUATION IN THE CULTIVATION OF CORN IN THE TOWNS OF ROCAFUERTE, PORTOVIEJO AND SANTA ANA THAT CORRESPOND TO THE PORTOVIEJO RIVER FENCE DURING THE DRY SEASON, AS WELL AS ESTIMATE ITS POPULATION FLUCTUATION. THE SAMPLING WAS USED BY THE ZIG ZAG METHODOLOGY, 5 SAMPLES WERE TAKEN AND THE SPECIMENS WERE PLACED IN ALCOHOL AT 98%.