Sonorini snakes are arthropod specialists but we know of only one published diet record for Stenorrhina freminvillei. Here we present quantitative data for predation on scorpions in nature by S. freminvillei: in nature, it consumes among other prey, relatively small scorpions, head-first.KEY WORDSSerpentes, Stenorrhina, scorpion, Centruroides, predation, venom.Los contenidos estomacales confirman que, en la naturaleza, Stenorrhina freminvillei consume escorpiones relativamente pequeños, iniciando por la parte cefálica.PALABRAS CLAVESerpentes, Stenorrhina, escorpión, Centruroides, depredación, veneno.