Key to the Species of Laterospinocoris

1. Head and pronotum (Figs. 43–45) uniformly red to reddish orange; hemelytra uniformly black, with a strong bluish sheen; legs dark brown to black; distribution: Guatemala and Mexico .................................... cyaneipennis (Reuter)

– Head largely or entirely red, often with the frons becoming brown; pronotum (Figs. 46–48) brown to black on anterior half, red on posterior half; hemelytra black with only a weak bluish sheen and costal margin narrowly pale; legs pale yellowish brown; distribution: Mexico ...................................................................... mexicanus, n. sp.