There are about 725 species of these beetles in North America. These jewel beetles are considered the most heavily armored insects as their name suggests. They are found in dead or dying trees. They are known to be attracted to forest fires hundreds of miles away, looking for those newly dead trees.
This is the family where the destructive Emerald Ash Borer (Agrilus planipennis) comes from; I mention this because the Emerald Ash Borer is unique in that it attacks live trees. There are about 725 species of Metallic Wood-boring Beetles in North America.
Most larvae are wood boring but some form galls, feed on cones, or feed on plants. The adults feed on pollen and nectar.
The eggs are generally laid in cracks near the site where the larvae fed but there are species that lay their eggs in the soil.