Cacoscelis nigripennis is a species of flea beetle in the family Chrysomelidae.
Adults have a black body, bright red head and thorax. They are usually 10 mm long and range between 5 mm and 4 mm wide.
They are well known for feeding on Passiflora caerulea, being one of the main problems for the plant when they are in large groups.
Cacoscelis nigripennis are native to South America.