Alurnus bicolor is a species of beetle of the family Chrysomelidae. It is found in Colombia and Panama.
Adults reach a length of about 37 mm. Adults have a black head and legs, while the pronotum is red. The basal part of the elytron is red, while the apical area is yellowish. There are three to five black spots.
They have been recorded feeding on Chamaedorea species.