A herbivorous Mexican ladybird, Epilachna varivestis, which is orange-yellow with black spots, feeds on the leaves of various bean plants, and is now a pest in the United States.
Origin
1920s.
Definition of Mexican bean beetle in US English:
Mexican bean beetle
noun
A herbivorous Mexican ladybird, Epilachna varivestis, which is orange-yellow with black spots, feeds on the leaves of various bean plants, and is now a pest in the United States.