Bean leaf Beetle

These yellowish to orange beetles love to chew holes in green beans, peas and corn.  They have 4 spots on their wings and a black triangle at the top of their wing covers.  Bean leaf beetle numbers can be reduced with good garden sanitation and planting green beans later in May to avoid the overwintering adults emerging in the spring.  Here are some links from K-State Research and Extension and Missouri Botanical Garden with more information about bean leaf beetles.
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https://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/Bean%20Leaf%20Beetle.pdf
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http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/beetles/bean-leaf-beetle.aspx

Bean Leaf Beetle

Bean Leaf Beetle damage