Lygaeid bug is a common name for bugs belonging to the family Lygaeidae. These bugs are easily recognizable by their flat and oval-shaped body. They are mostly found in gardens and agricultural fields where they feed on plant sap and seeds. Some common synonyms for lygaeid bug include milkweed bug, chinch bug, and tarnished plant bug. Milkweed bugs, also known as Oncopeltus fasciatus, have orange and black markings and are found on milkweed plants. Chinch bugs, also known as Blissus leucopterus, are pests of grasses and can cause damage to lawns and crops. Tarnished plant bugs, also known as Lygus lineolaris, are pests of many crops including cotton, alfalfa, and strawberries.