The leaf beetles (family Chrysomelidae) generally have antennae 1/2 their body length or less, and are characterized by their bright metallic colors. The adult beetles feed on leaves and flowers; the larvae attack roots, eat leaves, or tunnel within them. Many beetles of this family are important agricultural pests. There are roughly 1,400 species in North America. Habitat: Meadows and forest clearings, roadsides.

The larval stages of beetles in the subfamily Cryptocephalinae develop inside a case made of fecal material and plant debris, hence their common name "casebearer." They are also known as "cylindrical leaf" beetles. There are approximately 345 species in 22 genera in North America.