Mexican bean beetle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A spotted ladybug (Epilachna varivestis) of the eastern United States and Mexico that feeds on the leaves of beans, including soybeans.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun introduced into the United States from Mexico; feeds on the foliage of the bean plant