"Red bugs" . 1 . In Argentina, this is the name given to the mites of the family "Trombiculidae", known as "thrombiculids" or red mites. They live in places of low vegetation such as grasslands, adhering to the skin of any animal that passes near them, especially cattle, and then feeding on the degraded epithelial tissues of their host. They also tend to attack humans. 2 . Argentina, lunfardo . Derogatory term. People of the left or socialist ideology. Communist. It is born from the association of the words "bicho" (a mischievous person, of bad intentions - RAE) and "colorado" (a synonym for red, the color with which socialism is identified).