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Any of various insects of the family Blissidae that feed chiefly on grasses, especially Blissus leucopterus of North America, which damages grain crops and turf grasses.
1. (Animals) a black-and-white tropical American heteropterous insect, Blissus leucopterus, that is very destructive to grasses and cereals in the US: family Lygaeidae
2. (Animals) a related and similar European insect, Ischnodemus sabuleti
a small lygaeid bug, Blissus leucopterus, that feeds on corn, wheat, and other grains.