Predatory Ground Beetle Calosoma

Beetles in the genus Calosoma are called caterpillar hunters. They are among the largest in the Carabidae ground beetle family. Adults and larvae are active predators. Calosoma sycophanta is a large, metallic green beetle that was imported from Europe to New England for the biological control of the gypsy moth in 1905. The larva feeds day and night, consuming 50 caterpillars during its two-week developmental period. The adult will eat several hundred caterpillars during a life span of two to four years. There are also several native species of Calosoma. We have had several reports of these insects already this spring.
From Steve Bambara, NCSU Extension Entomologist