Spilostethus hospes, commonly known as the cotton stainer bug, is a species of insect belonging to the family Lygaeidae. It is found in various regions around the world, including Africa, Asia, and the Americas. These bugs are known for their distinctive red and black coloration, with the adults reaching a length of about 10-12 mm. They are considered agricultural pests as they feed on cotton plants, causing damage to the crops.