ground beetle

noun

1. any of numerous nocturnal, terrestrial beetles of the family Carabidae that feed chiefly on other insects.

noun

1. any beetle of the family Carabidae, often found under logs, stones, etc, having long legs and a dark coloration
2. any beetle of the family Tenebrionidae, feeding on plants and plant products
3. any of various other beetles that live close to or beneath the ground